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【单选题】
下列对分子及性质的解释中,不正确的是(    )
A.
碘易溶于四氯化碳,甲烷难溶于可用相似原理解释
B.
由于乳酸( )中存在一个手性碳原子,导致该物质存在互为镜像的两个手性异构体;生产中可利用“手性合成”法主要得到其中一种手性分子
C.
许多过渡金属离子对多种配体具有很强的结合力,因而,只有过渡金属才能形成配合物。
D.
由图可知酸性:H 3 PO 4 >HClO,因为H 3 PO 4 分子中有1个非羟基氧原子
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举一反三
【单选题】--Where is the man you talked about yesterday?--Look!______.
A.
Here he comes
B.
Here comes he
C.
Here does he come
D.
Here is he coming
【判断题】为了减少抽油杆的事故,发展了无游梁式抽油机。
A.
正确
B.
错误
【单选题】Can you make sure ______?
A.
that he will come here today
B.
when he will come here today
C.
if will he come here today
D.
whether will he come here today
【单选题】Mr. White came to Shanghai five years ago. Now he _____ the weather there. [     ]
A.
used to
B.
is used to
C.
used for
D.
is used for
【单选题】Whenever he was asked why he was late for clas
A.
30. Whenever he was asked why he was late for class,he would answer carelessly, always ______ the same thing. (江苏) A.saying        
B.
said          
C.
tosay          
D.
havingsaid
【单选题】引起口腔内感染最常见的病原菌是
A.
无芽胞厌氧菌
B.
甲型链球菌
C.
乙型链球菌
D.
金黄色葡萄球菌
E.
白色念珠菌
【单选题】I thought he didn't believe me_________, but he trusted me_________.
A.
in the beginning; in the end
B.
at the beginning; in the end
C.
in the beginning; at the end
D.
at the beginning; at the end
【单选题】______, everything would have been all right.
A.
He had been here
B.
Been here he had
C.
Here he had been
D.
Had he been here
【单选题】______ in thought, he didn't take notice of me when I was passing by.
A.
Lose
B.
Lost
C.
Having lost
D.
Have lost
【简答题】A.He didn't expect to buy a lot. B.He had only one bag of groceries. C.The supermarket is just down the block. D.He thought he'd get a ride with the Kramers.
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