某抽提装置返洗液流量为10t/h，进料流量为30t/h，进料芳烃含量为70％（质量分数），则返洗比为（）

Why didn"t Reagan take a bus to go to 10th and Sherman?__________ 抽提返洗液中烯烃高时，应（） It was July 24th when he arrived in London, ______ the 30th Olympic Games would be declared open 3 days later. 某抽提装置进料流量为50t/h，设计处理量为55t/h。则该装置的负荷率为（） 13 ___ had they reached the 30th floor ____ they realized that they had forgotten to take the key 精馏塔饱和蒸汽进料，则精馏段回流液流量与提馏段下降液体流量相等（） _____the morning of September 10th, we are going to give our teacher some flowers.[ ] It’s suggested that some activities to celebrate the 30th anniversary of the Reform and Opening-up. Using the standard normal curve, the z-score representing the 10th percentile is 1.28. 抽提汽提塔发泡时，返洗液中会夹带大量（） The 30th Olympic Games, ______ between July 27 and August 12 in 2012, will take place in London[ ] What advantages do you think London ________other cities in hosting the 30th Olympic Games? Our school will have the parents’ meeting _____ the afternoon of November 10th, and it will start _______3p.m. US President Barack Obama ________ a national speech at the 10th anniversary of 9/11 terror attacks.[ ] Our school has the parents’ meeting _____ the afternoon of October 10th, and it starts _______3p.m. I’m pleased to receive your letter of April 10th, ________ for our catalogue and price-list. I’ m pleased to receive your letter of April 10th, __________for our catalogue and price-list. The moment the people of London heard that their city had won the bid for the 30th Olympic Games, they ________ cheers. Lucy was born ______ January 30th, 1998, when her sister got married ______ a fashion designer. The 30th Olympic Games, _______ between July 27 and August 12 in 2012, will take place in London.