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News report 1 Questions 1 and 2 are based on the news report you have just heard.

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Answer the following two questions. 1. What are the functions of signal words? 2. How many types of signal words are commonly used in writing? What is the function of the following two sentences: (1) An experiment was designed to collect data for the study (2) The questions used in our studies are adapted from the studies by Richards (2004)( INTERVIEW 1  Questions 1 to 5 are based on an interview. At the end of the interview you will be given 10 seconds to answer each of the following five questions.   Now listen to the interview. Juliet became a taxi driver because 表达式 [1, 2] * 2 的值为_________: 1,2,1,2|[1, 2, 1, 2]|[1, 2], [1, 2]|[[1, 2], [1, 2]] CONVERSION 1  Questions1 to 5 are based on a conversation. At the end of the conversation you will be given 10 seconds to answer each of the following five questions.   Now listen to the conversation. Gary prefers The Timesto The Heraldand City Journalbecause 2, 2,8, -1, -2, 5, 1, 1, 2, -1, 1,( )。 1/(1+2)+1/(1+2+3)+1/(1+2+3+4)+……+1/(1+2+3+……+50)=() 2,2,8,-1,-2,5,1,1,2,-1,1,()。   (1+1/2+1/3)×(1/2+1/3+1/4)-(1+1/2+1/3+1/4)×(1/2+1/3)=() (1-1/22)(1-1/32)(1-1/42)...(1-1/20092)(1-1/20102)=()。   下列6组量子数均可表示一个2p电子:(1)2,1,0,+1/2(2)2,1,0,-1/2(3)2,1,1,+1/2(4)2,1,1,-1/2(5)2,1,-1,+1/2(6)2,1,-1,-1/2。氮原子中的各P电子,其量子数组合是(  )。 设α1=(1,2,-1,-2)T,α2=(1,1,-1,-1)T,α3=(-1,0,1,-1)T,β1=(2,5,-1,-5)T,β2=(2,5,1,-5)T,W1=L(α1,α2,α3),W2=L(β1,β2)(W1,W2分别表示 由α1,α2,α3和β1,β2生成的线性空间)。 (1)求W1∩W2的维度;(2)求W1∩W2的一个基。 (1-1/22)(1-1/32)(1-1/42)...(1-1/20092)(1-1/20102)=()。 下列各组量子数组合,合理的一组是( ): 1,2,0,+1/2 2,1,-1,-1/2 2,1,0,0 3,1,2,+1/2 2,1,1,1/2,1/4,()。 2,1,1,1/2,1/4,()。   —个数列为1,-1,2,-2,-1,1,-2,2,1,-1,2,-2,……则该数列第2009项为()。 肌节的组成是: 1/2 A带+I带+1/2 A带|1/2 A带+I带+1/2 I带|1/2 I带+1/2 A带|1/2 I带+A带+1/2 I带 设α1=(1,2.-1,-2)T,α2=(1,1,-1,-1)T,α3=(-1,0,1.-1)T,β1=(2.5.-1,-5)T,β2=(2.5.1,-5)T,W1=L(α1,α2,α3),W2=L(β1β2)(W1,W2分别发示由α1,α2,α3和β1β2生成的线性空间)(1)求W1∩W2的维度;(2)求W1∩W2的一个基。 设有向量组α(→)1=(1,-1,1,0),α(→)2=(1,2,-1,0),α(→)3=(0,1,1,1),α(→)4=(2,2,1,1),则以下命题正确的是(  )。
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