目前,我国农村修建沼气池需要哪些建池材料?

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问题:

目前,我国农村修建沼气池需要哪些建池材料?

考点:沼气生产工沼气生产工题库
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某烷烃29g完全燃烧后,生成CO244.8L(标准状况下)。又知14.5g该烃所占体积为5.6L (标准状况下)。它的一氯代物可能有

A.2种

B.3种

C.4种

D.只有一种

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II. 完形填空

阅读下面短文,掌握其大意,然后从36-55各题所给的A、B、C、D四个选项中,选出最佳选项。

The purpose of a letter of application (求职) is to help you to "sell" yourself. It should state   16  the job you want, and should tell what your abilities are and what you have   17   . It should be simple, human, personal and brief without  18   out any necessary facts.

In writing a letter of application, keep in   19  that things a possible employer is most   20  to want to know about are your qualification, your achievements and your aims. The opening paragraph is perhaps the most important part.   21  the first few sentences fail to  22   the reader's attention, the rest of the letter may not be   23  at all. Try to key your opening remarks to the needs or interests of the employer, not  24  your own needs or desires. For example, instead of beginning with "I saw your  25  in today's newspaper". You might say "I have made a careful  26  of your advertising during the past six months" or "I have made a survey in my neighborhood to find out how many housewives   27  your product and why they like it".

Try to  28  generalities (笼统) . Be clear about the kind of job for which you are now   29 . College graduates looking for their first positions often ask "What can I  30  in a letter? Employers want experience---which, naturally, no 31   has. The answer is that everything you have ever done is  32 .

It is important to write a good strong closing remark for your letter.  33  a specific request for an interview or give the possible employer something definite to do or expect. An excellent  34  is to enclose (内附) a stamped, self-addressed envelope with your letter. That makes it  35   for a possible employer to get in touch with you.

16. A. clearly          B. carefully         C. obviously             D. easily

17. A. found           B. done            C. known             D. heard

18. A. sending          B. taking            C. leaving              D. picking

19. A. brain            B. sight            C. order                D. mind

20. A. probable          B. possible         C. likely                D. able

21. A. While           B. Although        C. As                  D. If

22. A. pay              B. win             C. show                D. fix

23. A. kept             B. continued        C. written              D. read

24. A. to              B. for              C. into                  D. from

25. A. advertisement      B. report         C. article               D. introduction

26. A. watch           B. search            C. study                D. discussion

27. A. change          B. make            C. sell                   D. use

28. A. avoid            B. remember        C. protect              D. gain

29. A. losing           B. applying         C. preparing             D. fitting

30. A. offer            B. supply            C. mean                D. provide

31 .A. worker          B. beginner         C. owner               D. manager

32. A. success          B. development      C. practice              D. experience

33. A .Make            B. Ask             C. State                 D. Get

34. A. result            B. decision          C. promise                   D. idea

35. A. happier          B. easier                 C. heaper              D. safer

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进行性血胸的手术指征是什么?

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为了杜绝触电事故的发生,在正常情况下,必须把电力系统中的某一点接地,称为()。

A、保护接地

B、保护接零

C、工作接地

D、工作接零

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明知是走私毒品的犯罪分子,帮助其掩盖罪行以逃避刑罚处罚的行为,构成()。

A、包庇毒品犯罪分子罪

B、走私毒品罪

C、包庇走私毒品罪

D、包庇罪

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