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【单选题】
. 下面四个同分异构体中哪一种沸点最高 ?A.
己烷
B.
2- 甲基
C.
2,3- 二甲基丁烷
D.
2,2- 二甲基丁烷
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举一反三
【单选题】听力原文：W: I think I made the wrong choice to the third question on the exam. M: Come on. Why worry about that? It is no use weeping over split milk. Q: What does the man mean? (19)
A.
She made three wrong choices.
B.
She failed to pass the exam.
C.
Regret wouldn't do her any good.
D.
She didn't like the taste of milk.
【简答题】电气原理图中主电路就是从电源到电动机绕组的 电流通过的路径,控制电路中流过较 电流。
【简答题】根据句意，用括号内所给单词的适当形式填空。小题1:Thank you for your advice. It has been very (help)根据句意，用括号内所给单词的适当形式填空。 小题1:Thank you for your advice. It has been very ____(help). 小题2:Amy wants to be a ____(report) when...
【单选题】恶性贫血导致巨幼细胞性贫血的原因是（）
A.
维生素B 12 摄入不足
B.
维生素B 12 吸收障碍
C.
维生素B 12 利用障碍
D.
维生素B 12 丢失过多
E.
红细胞破坏过多
【简答题】根据史料分析美国《联邦宪法》有哪些进步内容?
【单选题】历史法通常遵循三个步骤，分别是()．
A.
史料的搜集、史料的鉴别、对史料进行分类
B.
史料的搜集、史料的筛选、史料的评价
C.
史料的搜集、史料的筛选、史料的分类
D.
史料的搜集、史料的鉴别、史料的评价
【简答题】It was shortly before midnight, and Dr Patricia was getting ready for bed. The phone rang on the end of the line was a woman about to break a promise. The woman was her mother’s neighbor. Flora Harris...
【简答题】In a happy town there lived a little, beautiful and smart girl, and 小题1:_______name was Rose. 小题2:___ in the town liked her. She was so brave, but one thing she was scared of was the doctor. One day h...
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