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【单选题】
一级不可逆液相反应 ，出口转化率x A =0.7，每批操作时间t+t 0 =2.06h，装置的生产能力为50000kg产物R/天，M R =60，则反应器的体积V为（）m 3 。A.
19.6
B.
20.2
C.
22.2
D.
23.4
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皮皮学刷刷变学霸
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【判断题】We have become the most intelligent animals in the world because we have used tools for
millions of years.
A.
正确
B.
错误
【单选题】听力原文： In the past few years, millions of Americans have become suddenly enthusiastic about the bicycle as if it were a great new invention. Annual bicycle sales doubled between 1960 and 1970, and ther...
A.
Nearly 7 million.
B.
Nearly 17 million.
C.
Nearly 70 million.
D.
Nearly 77 million.
【多选题】客户分类的常用方法有()
A.
AB客户分类，20%为A类客户，80%为B类客户。
B.
客户多维分类，按照地址、年龄、性别、收入、职业、教育程度等信息分类。
C.
客户价值分类，VIP客户、重要客户、普通客户、小客户
D.
潜在客户分类。
【单选题】If nothing is done to protect the environment, millions of spedes that are alive today will have become ________ .
A.
deteriorated
B.
degenerated
C.
suppressed
D.
extinct
【单选题】If nothing is done to protect the environment, millions of species that are alive today will have become _____.
A.
deteriorated
B.
degenerated
C.
suppressed
D.
extinct
【简答题】Millions have become members of health clubs and have _____________ health club one of the fastest growing business in the US today. And now the beneficial effects of these changing attitudes and beha...
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