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换一换
slack（）
A.缺乏；缺少 B.落后 C.零食，点心 D.偷懒；逃避工作
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文件松弛（残留）区slack
答案
Our business has been slack ______ three months.
A.in B.within C.over D.for
答案
Owing to the slack demand ______ their products for the time being, they do not think it advisable to buy the machine.
A.of B.for C.on D.in
答案
根据各节点在系统中的实际作用可将节点分类为：Slack节点、（）节点和（）节点。
答案
根据各节点在系统中的实际作用可将节点分类为：Slack节点、（）节点和（）节点
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中国大学MOOC: “But you’re fussy and grumpy. You break down a lot and your work is so slack!” Thomas is complaining of _______ engine.
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对于一生产计划问题，得到下列求解报告，说法正确的是（）。 Row Slack or Surplus Dual Price MAXF 14.00000 1.000000 A 0.000000 1.500000 B 0.000000 0.1250000 T 4.000000 0
A.资源A过剩 B.资源B过剩 C.资源T过剩 D.以上都不对
答案
在以收益最大为目标的生产计划问题中，用LINGO求解相应数学模型得到如下解的报告：Global optimal solution found.Objective value: 3360.000Total solver iterations: 2Variable Value Reduced CostX1 20.00000 0.000000X2 30.00000 0.000000Row Slack o
A.应该 B.不应该 C.不知道该不该
答案
Passage 3Tidal Power on the Cheap? A The startup, located on the Orkney Islands, way north of Scotland, has raised ￡6.2 million to build a working prototype of a floating tidal turbine that it says will be cheaper to install and maintain than others being tested now. The 8-meter-long prototype, ideally, will go into the water at the European Marine Energy Centre (EMEC) Tidal Test Site that sits just down the road from ScotRenewables in 2010. Commercial versions of the turbine will measure up to 40 meters long and weigh 250 tons, but generate 1.2 megawatts of power. B “That’s quite impressive when you compare it to others,” said CEO Barry Johnston. “We want to be competitive with offshore wind.” Rather than anchor a permanent turbine on the ocean floor, ScotRenewables will build a floating turbine that is slack moored with chains to an anchor on the sea floor. The body of the turbine-a long 40-meter tube of metal with a point at the end-will face directly into the tide. Below, two turbines attached to fins will convert the power of the tides into electricity. Johnston explained “A 1-meter prototype ScotRenewables is experimenting with in the wave tank is built. It looks like a model rocket with two fins with propellers attached to the ends of the fins.” C Tidal is the potentially most predictable, reliable form of renewable energy. With a tide table and computer, ScotRenewables can calculate the power output of a turbine decades in advance. You can’t do that with intermittent, variable sources like wind, solar or wave. Unfortunately, harnessing tidal power is quite difficult. Some of the prototypes that have been tested in the decades are quickly destroyed by rushing tides. Pulling those turbines up from the sea bed and taking them into the shop consumes time and money. Taking the ScotRenewables turbine in for repairs should be easy: maintenance workers would just have to tak
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When the right person is holding the right job at the right moment,that person’s influence is greatly expanded.That is the position in which Janet Yellen,who is expected to be confirmed as the next chair of the Federal Reserve Bank(FeD.inJanuary,now finds herself.If you believe,as many do,that unemployment is the major economic and social concern of ourday,then it is no stretch to think Yellen is the most powerful person in the world right now.Throughout the 2008 financialcrisis and the recession and recovery that followed,central banks have taken on the role of stimulators of last resort,holdingup the global economy with vast amounts of money in the form of asset buying.Yellen,previously a Fed vice chair,was one of the principal architects of the Fed"s$3.8 trillion money dump.A star economist known for her groundbreaking work on labormarkets,Yellen was a kind of prophetess early on in the crisis for her warnings about the subprime(次级债)meltdown.Now it will be her job to get the Fed and the markets out of the biggest and most unconventional monetary program in history without derailing the fragile recovery.The good news is that Yellen,67,is particularly well suited to meet these challenges.She has a keen understanding of financial markets,an appreciation for their imperfections and a strong belief that human suffering was more related to unemployment than anything else.Some experts worry that Yellen will be inclined to chase unemployment to the neglect of inflation.But with wages still relatively flat and the economy increasingly divided between the well-off and the long-termunemployed,more people worry about the opposite,deflation(通货紧缩)that would aggravate the economy’s problems.Either way,the incoming Fed chief will have to walk a fine line in slowly ending the stimulus.It must be steady enough todeflate bubbles and bring markets back down to earth but not so quick that it creates another credit crisis.Unlike many past Fed leaders,Yellen is not one to buy into the finance industry"s argument that it should be left alone toregulate itself.She knows all along the Fed has been too slack on regulation of finance.Yellen is likely to address the issueright after she pushes unemployment below 6%,stabilizes markets and makes sure that the recovery is more inclusive anD.robust.As Princeton Professor Alan Blinder says,“She’s smart as a whip,deeply logical,willing to argue but also a goodlistener.She can persuade without creating hostility.”All those traits will be useful as the global economy’s new power playertakes on its most annoying problems.What do many people think is the biggest problem facing Janet Yellen 《》（）
When the right person is holding the right job at the right moment,that person’s influence is greatly expanded.That is the position in which Janet Yellen,who is expected to be confirmed as the next chair of the Federal Reserve Bank(FeD.inJanuary,now finds herself.If you believe,as many do,that unemployment is the major economic and social concern of ourday,then it is no stretch to think Yellen is the most powerful person in the world right now.Throughout the 2008 financialcrisis and the recession and recovery that followed,central banks have taken on the role of stimulators of last resort,holdingup the global economy with vast amounts of money in the form of asset buying.Yellen,previously a Fed vice chair,was one of the principal architects of the Fed"s$3.8 trillion money dump.A star economist known for her groundbreaking work on labormarkets,Yellen was a kind of prophetess early on in the crisis for her warnings about the subprime(次级债)meltdown.Now it will be her job to get the Fed and the markets out of the biggest and most unconventional monetary program in history without derailing the fragile recovery.The good news is that Yellen,67,is particularly well suited to meet these challenges.She has a keen understanding of financial markets,an appreciation for their imperfections and a strong belief that human suffering was more related to unemployment than anything else.Some experts worry that Yellen will be inclined to chase unemployment to the neglect of inflation.But with wages still relatively flat and the economy increasingly divided between the well-off and the long-termunemployed,more people worry about the opposite,deflation(通货紧缩)that would aggravate the economy’s problems.Either way,the incoming Fed chief will have to walk a fine line in slowly ending the stimulus.It must be steady enough todeflate bubbles and bring markets back down to earth but not so quick that it creates another credit crisis.Unlike many past Fed leaders,Yellen is not one to buy into the finance industry"s argument that it should be left alone toregulate itself.She knows all along the Fed has been too slack on regulation of finance.Yellen is likely to address the issueright after she pushes unemployment below 6%,stabilizes markets and makes sure that the recovery is more inclusive anD.robust.As Princeton Professor Alan Blinder says,“She’s smart as a whip,deeply logical,willing to argue but also a goodlistener.She can persuade without creating hostility.”All those traits will be useful as the global economy’s new power playertakes on its most annoying problems.What did Yellen help the Fed do to tackle the 2008 financial crisis 《》（）
资料：Children back at school, nights slowly starting to draw in and the weather more changeable. The seasons are turning and after an eerily calm summer for financial markets, there"s a whiff of uncertainty in the air. Bond yields are up from their lows, and the relentless migration of global capital towards any asset, anywhere, with some yield, is slowing.The concern is the growing awareness of central banks" waning ability to boost growth with ever-lower interest rates and ever-bigger purchases of assets. The debate about if, when and how slowly the US Federal Reserve will raise interest drags on, but if downward pressure on global bond yields from the European Central Bank （ECB） and the Bank of Japan"s （BOJ） largesse is drawing to a close, that"s a bigger milestone for markets. A world of higher bond yields is one where the pressure to seek yield in exotic places is diminished. It"s also a world where the capital gains that accompanied falling yields become capital losses and investors question the merit of bonds over cash （or equities）.This search for yield in exotic places has, since the end of January, helped the Brazilian real gain more than 20% against the US dollar, with the Russian rouble managing almost as much. The dollar, itself, has fallen back is by 7.5% fall in trade-weighted terms, unwinding nearly 40% of the gains it has seen since mind-2014. There"s no need to panic about bond yields rising, because rate rises in Japan or the Eurozone are years away and the Fed"s still tinkering. But 10-year yields on both German and Japanese government bond yields fell below zero for the first time in late June. They have been edging higher through the summer. It"s almost as if investors really aren"t that keen on tying money up at negative yields for that long – why not stick to cash?In the US, estimates of "neutral" real interest rates are tumbling to around zero. Estimates of how much slack there is left in the labour market are being revised up and after five years when productivity growth has averaged a measly 0.5%, there"s widespread acceptance that it"s unlikely to accelerate by magic. But even if we take all of this into account, markets are now pricing in an extraordinarily slow pace of rate hikes by the Fed – from their current 0.25-0.5% range, to about 0.75% by the end of 2017 and to 1% by the end of 2018.GDP growth still oscillates around 2%, the Fed"s favoured measure of inflation is at 1.6% and the unemployment rate is trending lower. The pricing of the future path of short term rates seems too low even for the "new normal" economic environment. All of these currencies have gained against the pound and I can"t see that changing. Too much importance should not be placed on either the collapse in confidence immediately after the vote to leave the EU or the subsequent bounce.The economic impact of leaving the EU will be felt through delayed investment decisions as a result of uncertainty about when and on what terms it happens. A debilitating rather than a corrosive impact on the economy will be seen in slower, but positive growth. It will also be felt in further （slower） sterling weakness. The Bank of England has already cut policy rates from 0.5% to 0.25%, and there"s more to come from both the Bank and the pound over the next year. A 5% fall from here would take the pound close to €1.1, and we could see it fall below $1.25 as the Federal Reserve edges rates higher.The word “tumbling” in the sixth paragraph refers to ________falling
资料：Children back at school, nights slowly starting to draw in and the weather more changeable. The seasons are turning and after an eerily calm summer for financial markets, there"s a whiff of uncertainty in the air. Bond yields are up from their lows, and the relentless migration of global capital towards any asset, anywhere, with some yield, is slowing.The concern is the growing awareness of central banks" waning ability to boost growth with ever-lower interest rates and ever-bigger purchases of assets. The debate about if, when and how slowly the US Federal Reserve will raise interest drags on, but if downward pressure on global bond yields from the European Central Bank （ECB） and the Bank of Japan"s （BOJ） largesse is drawing to a close, that"s a bigger milestone for markets. A world of higher bond yields is one where the pressure to seek yield in exotic places is diminished. It"s also a world where the capital gains that accompanied falling yields become capital losses and investors question the merit of bonds over cash （or equities）.This search for yield in exotic places has, since the end of January, helped the Brazilian real gain more than 20% against the US dollar, with the Russian rouble managing almost as much. The dollar, itself, has fallen back is by 7.5% fall in trade-weighted terms, unwinding nearly 40% of the gains it has seen since mind-2014. There"s no need to panic about bond yields rising, because rate rises in Japan or the Eurozone are years away and the Fed"s still tinkering. But 10-year yields on both German and Japanese government bond yields fell below zero for the first time in late June. They have been edging higher through the summer. It"s almost as if investors really aren"t that keen on tying money up at negative yields for that long – why not stick to cash?In the US, estimates of "neutral" real interest rates are tumbling to around zero. Estimates of how much slack there is left in the labour market are being revised up and after five years when productivity growth has averaged a measly 0.5%, there"s widespread acceptance that it"s unlikely to accelerate by magic. But even if we take all of this into account, markets are now pricing in an extraordinarily slow pace of rate hikes by the Fed – from their current 0.25-0.5% range, to about 0.75% by the end of 2017 and to 1% by the end of 2018.GDP growth still oscillates around 2%, the Fed"s favoured measure of inflation is at 1.6% and the unemployment rate is trending lower. The pricing of the future path of short term rates seems too low even for the "new normal" economic environment. All of these currencies have gained against the pound and I can"t see that changing. Too much importance should not be placed on either the collapse in confidence immediately after the vote to leave the EU or the subsequent bounce.The economic impact of leaving the EU will be felt through delayed investment decisions as a result of uncertainty about when and on what terms it happens. A debilitating rather than a corrosive impact on the economy will be seen in slower, but positive growth. It will also be felt in further （slower） sterling weakness. The Bank of England has already cut policy rates from 0.5% to 0.25%, and there"s more to come from both the Bank and the pound over the next year. A 5% fall from here would take the pound close to €1.1, and we could see it fall below $1.25 as the Federal Reserve edges rates higher.According to the the passage and the regularity of rate hikes fixed by the fed in the past years，which of the following average percentage of rates will rise each of the coming years?
资料：Children back at school, nights slowly starting to draw in and the weather more changeable. The seasons are turning and after an eerily calm summer for financial markets, there"s a whiff of uncertainty in the air. Bond yields are up from their lows, and the relentless migration of global capital towards any asset, anywhere, with some yield, is slowing.The concern is the growing awareness of central banks" waning ability to boost growth with ever-lower interest rates and ever-bigger purchases of assets. The debate about if, when and how slowly the US Federal Reserve will raise interest drags on, but if downward pressure on global bond yields from the European Central Bank （ECB） and the Bank of Japan"s （BOJ） largesse is drawing to a close, that"s a bigger milestone for markets. A world of higher bond yields is one where the pressure to seek yield in exotic places is diminished. It"s also a world where the capital gains that accompanied falling yields become capital losses and investors question the merit of bonds over cash （or equities）.This search for yield in exotic places has, since the end of January, helped the Brazilian real gain more than 20% against the US dollar, with the Russian rouble managing almost as much. The dollar, itself, has fallen back is by 7.5% fall in trade-weighted terms, unwinding nearly 40% of the gains it has seen since mind-2014. There"s no need to panic about bond yields rising, because rate rises in Japan or the Eurozone are years away and the Fed"s still tinkering. But 10-year yields on both German and Japanese government bond yields fell below zero for the first time in late June. They have been edging higher through the summer. It"s almost as if investors really aren"t that keen on tying money up at negative yields for that long – why not stick to cash?In the US, estimates of "neutral" real interest rates are tumbling to around zero. Estimates of how much slack there is left in the labour market are being revised up and after five years when productivity growth has averaged a measly 0.5%, there"s widespread acceptance that it"s unlikely to accelerate by magic. But even if we take all of this into account, markets are now pricing in an extraordinarily slow pace of rate hikes by the Fed – from their current 0.25-0.5% range, to about 0.75% by the end of 2017 and to 1% by the end of 2018.GDP growth still oscillates around 2%, the Fed"s favoured measure of inflation is at 1.6% and the unemployment rate is trending lower. The pricing of the future path of short term rates seems too low even for the "new normal" economic environment. All of these currencies have gained against the pound and I can"t see that changing. Too much importance should not be placed on either the collapse in confidence immediately after the vote to leave the EU or the subsequent bounce.The economic impact of leaving the EU will be felt through delayed investment decisions as a result of uncertainty about when and on what terms it happens. A debilitating rather than a corrosive impact on the economy will be seen in slower, but positive growth. It will also be felt in further （slower） sterling weakness. The Bank of England has already cut policy rates from 0.5% to 0.25%, and there"s more to come from both the Bank and the pound over the next year. A 5% fall from here would take the pound close to €1.1, and we could see it fall below $1.25 as the Federal Reserve edges rates higher.According to the the passage which of the followings is Not true?
资料：Children back at school, nights slowly starting to draw in and the weather more changeable. The seasons are turning and after an eerily calm summer for financial markets, there"s a whiff of uncertainty in the air. Bond yields are up from their lows, and the relentless migration of global capital towards any asset, anywhere, with some yield, is slowing.The concern is the growing awareness of central banks" waning ability to boost growth with ever-lower interest rates and ever-bigger purchases of assets. The debate about if, when and how slowly the US Federal Reserve will raise interest drags on, but if downward pressure on global bond yields from the European Central Bank （ECB） and the Bank of Japan"s （BOJ） largesse is drawing to a close, that"s a bigger milestone for markets. A world of higher bond yields is one where the pressure to seek yield in exotic places is diminished. It"s also a world where the capital gains that accompanied falling yields become capital losses and investors question the merit of bonds over cash （or equities）.This search for yield in exotic places has, since the end of January, helped the Brazilian real gain more than 20% against the US dollar, with the Russian rouble managing almost as much. The dollar, itself, has fallen back is by 7.5% fall in trade-weighted terms, unwinding nearly 40% of the gains it has seen since mind-2014. There"s no need to panic about bond yields rising, because rate rises in Japan or the Eurozone are years away and the Fed"s still tinkering. But 10-year yields on both German and Japanese government bond yields fell below zero for the first time in late June. They have been edging higher through the summer. It"s almost as if investors really aren"t that keen on tying money up at negative yields for that long – why not stick to cash?In the US, estimates of "neutral" real interest rates are tumbling to around zero. Estimates of how much slack there is left in the labour market are being revised up and after five years when productivity growth has averaged a measly 0.5%, there"s widespread acceptance that it"s unlikely to accelerate by magic. But even if we take all of this into account, markets are now pricing in an extraordinarily slow pace of rate hikes by the Fed – from their current 0.25-0.5% range, to about 0.75% by the end of 2017 and to 1% by the end of 2018.GDP growth still oscillates around 2%, the Fed"s favoured measure of inflation is at 1.6% and the unemployment rate is trending lower. The pricing of the future path of short term rates seems too low even for the "new normal" economic environment. All of these currencies have gained against the pound and I can"t see that changing. Too much importance should not be placed on either the collapse in confidence immediately after the vote to leave the EU or the subsequent bounce.The economic impact of leaving the EU will be felt through delayed investment decisions as a result of uncertainty about when and on what terms it happens. A debilitating rather than a corrosive impact on the economy will be seen in slower, but positive growth. It will also be felt in further （slower） sterling weakness. The Bank of England has already cut policy rates from 0.5% to 0.25%, and there"s more to come from both the Bank and the pound over the next year. A 5% fall from here would take the pound close to €1.1, and we could see it fall below $1.25 as the Federal Reserve edges rates higher.According to the the passage which of the followings is true?
资料：Children back at school, nights slowly starting to draw in and the weather more changeable. The seasons are turning and after an eerily calm summer for financial markets, there"s a whiff of uncertainty in the air. Bond yields are up from their lows, and the relentless migration of global capital towards any asset, anywhere, with some yield, is slowing.The concern is the growing awareness of central banks" waning ability to boost growth with ever-lower interest rates and ever-bigger purchases of assets. The debate about if, when and how slowly the US Federal Reserve will raise interest drags on, but if downward pressure on global bond yields from the European Central Bank （ECB） and the Bank of Japan"s （BOJ） largesse is drawing to a close, that"s a bigger milestone for markets. A world of higher bond yields is one where the pressure to seek yield in exotic places is diminished. It"s also a world where the capital gains that accompanied falling yields become capital losses and investors question the merit of bonds over cash （or equities）.This search for yield in exotic places has, since the end of January, helped the Brazilian real gain more than 20% against the US dollar, with the Russian rouble managing almost as much. The dollar, itself, has fallen back is by 7.5% fall in trade-weighted terms, unwinding nearly 40% of the gains it has seen since mind-2014. There"s no need to panic about bond yields rising, because rate rises in Japan or the Eurozone are years away and the Fed"s still tinkering. But 10-year yields on both German and Japanese government bond yields fell below zero for the first time in late June. They have been edging higher through the summer. It"s almost as if investors really aren"t that keen on tying money up at negative yields for that long – why not stick to cash?In the US, estimates of "neutral" real interest rates are tumbling to around zero. Estimates of how much slack there is left in the labour market are being revised up and after five years when productivity growth has averaged a measly 0.5%, there"s widespread acceptance that it"s unlikely to accelerate by magic. But even if we take all of this into account, markets are now pricing in an extraordinarily slow pace of rate hikes by the Fed – from their current 0.25-0.5% range, to about 0.75% by the end of 2017 and to 1% by the end of 2018.GDP growth still oscillates around 2%, the Fed"s favoured measure of inflation is at 1.6% and the unemployment rate is trending lower. The pricing of the future path of short term rates seems too low even for the "new normal" economic environment. All of these currencies have gained against the pound and I can"t see that changing. Too much importance should not be placed on either the collapse in confidence immediately after the vote to leave the EU or the subsequent bounce.The economic impact of leaving the EU will be felt through delayed investment decisions as a result of uncertainty about when and on what terms it happens. A debilitating rather than a corrosive impact on the economy will be seen in slower, but positive growth. It will also be felt in further （slower） sterling weakness. The Bank of England has already cut policy rates from 0.5% to 0.25%, and there"s more to come from both the Bank and the pound over the next year. A 5% fall from here would take the pound close to €1.1, and we could see it fall below $1.25 as the Federal Reserve edges rates higher. According to the last paragraph which of the followings is Not true?After Britain leaving the E.U the investment decision of investors has been affected
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