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【简答题】
由乙烯制取二氯乙烷,反应式为C2H4+Cl2 ClH2C-CH2Cl。通入反应的乙烯量为600Kg/h, 其中乙烯含量为92%(wt%),反应后得到二氯乙烷为1700 Kg/h,并测得尾气中乙烯量为40 Kg/h, 则乙烯的转化率、二氯乙烷的产率及收率分别是( ) A. 93.3% 94% 92.8% B. 93.3% 95.1% 93.2% C. 94.1% 95.4% 93.1% D. 94.1% 95.6% 96.7%
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【简答题】Once there was a little girl in a village. She spent summers on her grandfather’s farm. The year she was four, she knew some ducks. The ducks were white with orange feet. They lived in a little wooden...
【简答题】She’s a little unfriendly. ________________
【单选题】She's beginning to recover now and taking a little ______.
A.
nourishment
B.
diet
C.
nourishing
D.
feeding
【单选题】She's too thin. She ________ gain some weight but she ________ too little. [     ]
A.
would; ate
B.
will; eats
C.
would; eats
D.
will; ate
【简答题】在胆道疾病中最容易发生休克的是
【单选题】—She has never read this book, __________ she? —__________, so she knows little about it.
A.
has, No, she hasn’t.
B.
hasn’t, Yes, she does.
C.
has, Yes, she hasn’t.
D.
hasn’t, No, she does
【单选题】My room is a little bigger than _______. [     ]
A.
her
B.
she
C.
she's
D.
hers
【单选题】Why did Peter feel that he had seen the little gift's sister when she came in?
A.
She and the little girl looked very much alike.
B.
She looked very much alike with Peter's lost girlfriend.
C.
Her hairs and eyes were of the same color with those of the little girl's.
D.
Her hairs and eyes were of the same color with those of Peter's lost girlfriend's.
【简答题】认知结构迁移理论的提出者是( )
【单选题】认知结构迁移理论的提出者是
A.
桑代克
B.
贾德
C.
奥苏伯尔
D.
布鲁纳
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