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【单选题】
下列化合物中,同时有n→ *, → *, → *跃迁的化合物是()。
A.
一氯甲烷
B.
丙酮
C.
1,3-丁二烯
D.
甲醇
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【简答题】短文改错(共10小题;每小题1分,满分10分) True friends are those lend you a helping hand instead of leave you when you get into trouble. True friend s pointed out your mistake and urge you to correct it when you do not...
【简答题】Instead of helping him cheat, the Internet is actually helping him _____ _____ ______ ________, while also helping to _______ ___ ____ _____ and ______ _____. 因特网并没有帮助他欺骗,而是帮他 了解学校课程 ,也帮他 发展生活 和 社交技能 ...
【单选题】Simon laughed at me______ helping me with my problem. [     ]
A.
instead
B.
so that
C.
so
D.
instead of
【单选题】Instead of helping the rebel soldiers, a photographer chose to watch the army officer kill those soldiers and just took photos.
A.
Para3
B.
Para4
C.
Para5
D.
Para6
E.
Para7
F.
Para8
G.
Para9
【判断题】Senior male colleagues tended to solve the problem for her, instead of helping her find the solution.
A.
正确
B.
错误
【单选题】Millie and Kitty are good friends, they often _________ each other _________study.
A.
helping; with
B.
help; to
C.
helping; to
D.
help; with
【多选题】下列有关精馏说法中正确的是 ________ 。
A.
精馏是利用液体混合物中各组分挥发度不同的性质,将其进行高纯度分离的操作
B.
精馏塔内塔顶的液相回流和塔釜中产生的蒸气(气相回流)构成了气、液两相接触传质的必要条件
C.
精馏塔内溶液组分挥发度的差异( a>1 )造成了有利的相平衡条件( y>x )
D.
精馏区别于蒸馏就在于“回流”包括塔顶的液相回流与塔釜造成的气相回流
E.
精馏过程的基础仍然是组分挥发度的差异
【简答题】A.Offering multilingual instead of bilingual programs. B.Learning by practicing instead of following the teacher's lecture. C.Helping new immigrant students adapt quickly to the new environment. D.Hel...
【判断题】诚信无欺是商人的基本准则,心志专一则是商人成功的必备素质。
A.
正确
B.
错误
【单选题】Thank you _____ me. [     ]
A.
to help
B.
to helping
C.
for helping
D.
of helping
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