问题 单项选择题

旋风分离器的主体上部为圆筒,下部为一圆锥形底,锥底下部有排灰口,圆筒上部装有顶盖,侧面装一(),圆筒的上部中央处装一排气管。

A、圆形截面进气管

B、正方形截面进气管

C、矩形截面进气管

D、梯形截面进气管

答案

参考答案:C

选择题
完形填空

All our dreams have something to do with our feelings, fears, longings, wishes, needs and memories. But something on the “outside” may affect what we ___1__. If a person is hungry or tired or cold, his dream may include a feeling of this kind. If the ___2___ on your body has slipped off your bed, you may dream that you are ___3___ or resting on the ice and snow. The material for the dream you will ___4___ tonight is probably to come from the experiences you have today.

__5___ the subject of your dream usually comes from something that has an effect on you ___6___ you are sleeping (feeling of cold, a noise, a discomfort, etc.) and it may also use your past experiences and the wishes and interests you have now. This is why very young __7___ are likely to dream of fairies(仙女), older children of school examinations, ___8___ people of food, homesick soldiers of their families and prisoners of freedom.

To show you how that is ___9___ while you are asleep and how your wishes or needs can all be joined together in a dream, ___10___ is the story of an experiment. A man was asleep and the back of his ___11___ was rubbed ___12__ a piece of cotton. He would dream that he ___13___ in a hospital and his girlfriend was visiting him, ___14___ on the bed and feeling gently his hand!

There are some scientists who have made a special ___15__ of why we dream, what we dream and what those dreams ___16__. Their explanation of dreams, though a bit reasonable, is not accepted by everyone, but it ___17__ an interesting approach(方法) to the problem. They believe that dreams are ___18___ expressions of wishes that didn’t ___19___. In other words, a dream is a way of having your wishes ___20___ out.

1. A. long       B. dream C. think   D. wish

2. A. blanket   B. book   C. shoe    D. trousers

3. A. working B. running      C. sleeping     D. studying

4. A. have       B. meet   C. see      D. think

5. A. But B. For     C. Because      D. So

6. A. before    B. while  C. after   D. during

7. A. children  B. fathers       C. drivers       D. gentlemen

8. A. happy     B. sad     C. hungry       D. old

9. A. taking    B. happening  C. dreaming    D. carrying    

10. A. that      B. it C. here    D. this

11. A. leg       B. head   C. body   D. hand  

12. A. in  B. of       C. with    D. off

13. A. left       B. lived   C. gave   D. was

14. A. waiting B. sitting C. smiling      D. speaking

15. A. study    B. watch  C. sleep   D. way

16. A. stand    B. do      C. form   D. mean

17. A. makes   B. offers  C. finds   D. demands

18. A. any      B. almost C. mostly       D. hardly

19. A. get       B. arrive  C. come true   D. believe in

20. A. carried  B. taken  C. kept    D. called