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【单选题】
乙烯精馏塔精料中乙烷和乙烯占99.5%以上,所以乙烯精馏塔可看做是( )系统:
A.
二元精馏
B.
三元精馏
C.
多组分精馏
D.
以上都不对
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参考答案:
举一反三
【单选题】小林有一次偷拿水果摊上的苹果被老师叫到了办公室,老师批评他:“为什么总是拿别人的东西?”小林低着头回答:“我也知道不对,就是有时忍不住。”这说明小林缺乏( )。 (2016上真题)
A.
道德认识教育
B.
道德情感教育
C.
道德意志教育
D.
道德行为教育
【简答题】I.I finally got the job I dreamed about. Never in my life _____ so happy. A. did I feel B. I felt C. I had felt D. had I felt 2. Not a single song ____ at yesterday’s party. A. she sang B. sand s...
【判断题】相对引用地址的表示方法是在行号和列号之前都加上一个符号“$”,例如$E$3。
A.
正确
B.
错误
【单选题】碘-淀粉溶液吸收法测定硫酸生产过程中净化气或转化气中SO2时,在反应管中放置一定量的碘标液,与淀粉溶液混合为( )色溶液。将含有SO2混合气通入后,通过定量吸收,SO2被游离碘氧化为硫酸,蓝色消失为终点。
A.
B.
C.
深蓝
D.
【单选题】碘-淀粉溶液吸收法测定硫酸生产过程中净化气或转化气中SO2时,测量到的气体体积为吸收后的剩余气体体积,且是在水蒸气饱和下的体积,计算时要换算为( )体积。
A.
标准态
B.
100℃时
C.
测量温度时的
D.
干气
【简答题】I had no plans last night, so I went to a movie. I asked Amy to go, but she was ______ and had to work _______. She told me about a Spanish movie at the Quad, and that's where I went. It was a very __...
【单选题】碘-淀粉溶液吸收法测定硫酸生产过程中净化气或转化气中SO2时,通过测量吸收后( )和根据所消耗的碘标液的体积及浓度,计算出气体中SO2的含量。
A.
剩余气体的体积
B.
剩余气体的温度
C.
剩余气体的压强
D.
剩余气体的密度
【判断题】碘-淀粉溶液吸收粉测量净化气或转化气中SO2含量过程中,测量结果的计算需要使用测量当时的大气压。( )
A.
正确
B.
错误
【简答题】Review the text and fill in each blank with no more than four words: The Phantom was an ugly man who had to (1) _________. He loved singing and had (2) ______. Hemet a beautiful young singer and he (3...
【简答题】Fill in the blanks with suitable words to make the sentences ironical. eg. She was as robust as Sister Lin in Dream of the Red Chamber. 1. I was really impressed. He sang as as a crow when half choked...
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