{an}是由实数构成的无穷等比数列,sn=a1+a2+…+an,关于数列{sn}

题型:选择题

问题:

{an}是由实数构成的无穷等比数列,sn=a1+a2+…+an,关于数列{sn},给出下列命题:①数列{sn}中任意一项均不为0;②数列{sn}中必有一项为0;③数列中或者任意一项不为0;或者有无穷多项为0;④数列{sn}中一定不可能出现sn=sn+2;⑤数列{sn}中一定不可能出现sn=sn+3;其中正确的命题是(  )
A.①③B.②④C.③⑤D.②⑤
考点:等比数列的前n项和
题型:选择题

用久了的黑板常会因“反光”而看不清上面的字,这是因为射到黑板上的光发生了          的缘故.我们能从不同的方向看清书上的图象,是因为射到书上的光发生了       的缘故.

题型:选择题

地壳深处的断层运动会引发地震,并造成地层断裂错位。分析某地区地层剖面示意图,完成问题。

小题1:该地区地质历史上发生过地震至少 

A.2次

B.3次

C.4次

D.5次小题2:根据图中断层与岩层的关系,可以推断

A.c断层早于②地层

B.b断层早于④地层

C.a断层早于b断层

D.c断层早于b断层

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第二节简答题(共4小题; 10分)

阅读短文,根据所要求的字数回答问题。

TV viewers may no longer be able to hear English abbreviations (缩写), like "NBA" (National Basketball Association), from mainland broadcasters.

China Central Television (CCTV) and Beijing Television (BTV) confirmed to China Daily on Tuesday that they had received a notice from a related government department, asking them to avoid using certain English abbreviations in Chinese programs.

The channels, however, did not reveal exactly how many English abbreviations are listed in the notice.

The notice not only limits the use of English abbreviations in sports news, but also in economic and political news. Abbreviations such as "GDP" (gross domestic product), "WTO" (World Trade Organization) and "CPI" (consumer price index) will also be substituted(代替)with their Chinese pronunciations, it said.

The move comes after a growing number of national legislators(立法委员)and political advisors called for preventive measures to preserve(保存)the purity of the Chinese language.

"If we don't pay attention and don't take measures to stop mixing Chinese with English, the Chinese language won't remain pure in a couple of years," said Huang Youyi, editor-in-chief of the China International Publishing Group and secretary-general of the Translators' Association of China.

The restricted use of English abbreviations on Chinese television programs has provoked a debate among scholars.

"It makes no sense to introduce a regulation to prevent the use of English in the Chinese language in the face of globalization(全球化)," Liu Yaoying, a professor at the Communication University of China, said on Tuesday. "It is cultural conservatism(保守主义)。"

"If Western countries can accept some Chinglish words, why can't the Chinese language be mixed with English?"

86. What does the government tell TV stations to do in the notice? (no more than 12 words)

_________________________________________________.

87. In what TV programs English abbreviations are limited? (List three of them)

_________________________________________________.

88. According to Huang Youyi’s opinion, why should we stop using English abbreviations?

(no more than 10 words)

_________________________________________________.

89. “Chinglish” in the last sentence means __________________. (no more than 10 words)

题型:选择题

词汇运用  用所给词的适当形式填空,每空不限一词。

1. I think it’s ______( use ) to talk with him. It’s difficult to change his mind.

2. The terrible snowstorm kept them from______( ski ) last week.

3. My uncle will come back from London. I’m waiting for his ______ ( arrive ).

4. ______ ( wolf ) eat smaller animals when they are hungry.

5. ______(luck ), he was hurt badly.

6. His grandpa was lucky enough to stay ______( live ) during the earthquake.

7. Lushan is so beautiful that he wants to go there for the ______ ( two ) time.

8. We should encourage people ______ ( not cut ) trees any more.

9. I ______( drive ) to Beijing when my car broke down.

10.The young trees ______( die ) soon if you don’t water them in time.

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泽泻的临床应用是()

A、胆道蛔虫症

B、高脂血症

C、支气管哮喘

D、小儿流涎

E、休克

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