叶轮式压气机按其出口压力的高低分为三类,其中,通风机的出口表压力为()MPa。A.≤

题型:单项选择题

问题:

叶轮式压气机按其出口压力的高低分为三类,其中,通风机的出口表压力为()MPa。

A.≤0.0002

B.0.0002~0.015

C.0.015~0.04

D.≥0.04

考点:海船船员考试船舶辅机(大管轮)船舶辅机(大管轮)题库
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分析通货膨胀对证券市场的影响,应遵循的一般性原则是()。

A.温和的、稳定的通货膨胀对股价的影响较小。通货膨胀提高了债券的必要收益率,从而引起债券价格下跌

B.如果通货膨胀在一定的可容忍范围内持续,而经济处于景气(扩张)阶段,产量和就业都持续增长,那么股价也将持续上升

C.严重的通货膨胀是很危险的,经济将被严重扭曲,货币加速贬值,这时人们将会囤积商品,购买房屋等进行保值,从而影响资金供求关系

D.政府往往不会长期容忍通货膨胀存在,因而必然会使用某些宏观经济政策工具来抑制通货膨胀,这些政策必然对经济运行造成影响

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有一伸臂梁受力及支承如下图所示,则固定端A的弯矩为()kN·m。

A.2

B.3

C.6

D.9

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根据以《以财务报告为目的的评估指南(试行)》第二十八条的规定,公允价值的可靠性受制于数据获取来源,其根据首先考虑采用()。

A.成本法

B.收益法

C.市场法

D.任何一种方法都可以

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There are about fifteen hundred languages in the world.

But ___1___ a few of them are very ___2___. English is one of these. Many, many people use it, not only in England and the U. S. A, but in other parts of the world. About 200, 000, 000 speak it as their own language. It is difficult to say how many people are learning it as a ___3___ language. Many millions are ___4___ to do so.

Is it easy or difficult to learn English? Different people may have different ___5___. Have you ever ___6___ the ads of this kind in the newspapers or magazines?

“Learn English in six month, or your ___7___ back ...” “Easy and funny? Our records and tapes ___8___ you master your English in a month. ___9___ the first day your ___10___ will be excellent. Just send ...” Of course, it never ___11___ quite like this.

The only language that seems easy to learn is the mother tongue. We should ___12___ that we all learned our own language well when we were ___13___. If we could learn English in the same way, it would not seem so difficult. ___14___ what a small child does. He listens to what people say. He tries what he hears. When he is using the language, talking in it, and ___15___ in it all the time, just imagine how much ___16___ that gets!

So it is ___17___ to say that learning English is easy, because a good command of English ___18___ upon a lot of practice. And practice needs great effort and ___19___ much time. Good teachers, records, tapes, books, and dictionaries will ___20___. But they cannot do the student’s work for him.

1. A. not  B. quite   C. only    D. very

2. A. difficult  B. important   C. necessary    D. easy

3. A. native     B. foreign       C. useful D. mother

4. A. learning  B. enjoying     C. trying D. liking

5. A. questions       B. problems    C. ideas   D. answers

6. A. found     B. watched     C. noticed       D. known

7. A. knowledge     B. time    C. money       D. English

8. A. make      B. help    C. let      D. allow

9. A. From     B. On      C. Since  D. After

10. A. spelling       B. grammar    C. English      D. pronunciation

11. A. happened     B. know  C. seemed       D. felt

12. A. know    B. remember   C. understand  D. think

13. A. students       B. children     C. babies D. grown-ups

14. A. Imagine       B. Mind  C. Do      D. Think of

15. A. using    B. thinking     C. trying D. practicing

16. A. time     B. money       C. language    D. practice

17. A. hard     B. easy    C. funny  D. silly

18. A. depends       B. tries    C. has     D. takes

19. A. uses      B. takes   C. gets    D. costs

20. A. do B. work   C. help    D. master

题型:单项选择题

关节结核的X线表现如何?

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