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某二元混合液在一常压连续精馏塔中进行分离，要求塔顶产品中易挥发组分达94%，塔底产品易挥发组分为4%(均为摩尔分数)，已知该塔进料线方程为：y=6x-1.5，采用操作回流比为1.5R min ，相对挥发度为2。试求：
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【单选题】These colleges are ___________ inspected by government officials.
A.
periodically
B.
period
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【单选题】Typically using Wi-Fi technology, these wireless access points are typically available from public places such as coffee shops,libraries,bookstores,colleges,and universities.
A.
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B.
PANs
C.
extranets
D.
LANs
【简答题】C omplete the passage , using appropriate words. Greek le t ter organizations are social organizations that exist in North American colleges.__1____ (Male/Man/Manly) groups are known as fratern i ties...
【简答题】听力 11-12 篇测试 Online education, or (1)__________ learning, has really taken on a life of its own in the past few years. With the (2)__________ of the Internet, it is becoming easier and easier to join...
【简答题】7 January, 2014 A new report says more and more international students are attending colleges and universities in the United States. It also notes a large increase in the number of international stude...
【简答题】Choose the correct alternative in italics in these sentences, written by IELTS candidates. 1 The steadiest / most steady development can be seen in the USA. 2 The second popular / most popular univers...
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