19设y=3+cosx,则y＇=
解析：解析:
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40. "We won＇t be finished until tonight."“And they ( )."
A. will, either
B. won＇t, too
C. will, neither
D. won＇t, either
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25( ) in the strange city, poor Bill fell to ( ).
A. Lost…crying
B. Lost…cry
C. Having been lost…crying
D. To lese…cry
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21. The movie we saw last night was very different ( ) the novel.
A. of
B. to
C. from
D. with
解析：解析:be different from
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25. The government gave several good ( ) for increasing the tax on cigarettes.
A. purposes
B. reasons
C. questions
D. problems
解析：解析:purpose 目的解析:reason 原因解析:question 问题解析:problem 问题
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3.China is a ( ) country while the U.S. is a ( ) country.
A. developed ; developed
B. developing ; developed
C. developing ; developing
D. developed ; developing
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3. New ideas sometimes have to wait for years before they ( ) fully.
A. accept
B. receive
C. are accepted
D. are received
解析：解析:they 指代new ideas解析:receive:1.收到别人给予的东西,不含收件人是否愿意接受之义。解析:I received a letter from a good friend of mine yesterday.2.也可表示"得到", "领受","遭受"之意。解析:The book was favorably received by the public.Accept: "收到",强调主观意愿决定"接受","收授"。而receive只表示收到,不一定接受。解析:She received a gift from him, but did not accept it.解析:receive 与 accept 在表示赞成某一看法,意见时可以换用。解析:The moral code is now received / accepted by all.
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17. ( ) is known to the world, Mark Twain was a great American writer.
A. That
B. Which
C. As
D. It
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29社会保障是()
A. 自然经济和半自然经济的产物
B. 资本主义制度的产物
C. 社会主义制度的产物
D. 社会化大生产的产物
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6. Mr. Li is going to visit the university ( ) he studied 25 years ago.
A. where
B. which
C. that
D. in where
解析：解析:in which
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