并排置于屋面的两台机组经测定其声功率级分别为65dB和60dB，则距机组5m处的声压 发布时间：2018-01-03 23:45 │ 来源：www.tikuol.com 题型：单项选择题 问题： 并排置于屋面的两台机组经测定其声功率级分别为65dB和60dB，则距机组5m处的声压级为______dB。A．40.3 B．35 C．60 D．44.3
题型：单项选择题 完形填空。 "Cheese"-a metaphor (隐喻) for what we want to have in life, whether it is a job, a relationship, or money. Each of us has our own 1 of what cheese is, and we want to 2 it because we believe it makes us 3 . Once there lived four little characters. Two were 4 named Sniff and Scurry and two were little people named Hem and Haw. Every morning, the mice and the little people 5 their running wear and went to Cheese Station C 6 they found their cheese. It was such a large store of cheese that Hem and Haw 7 moved their homes to be closer to it. One morning, Sniff and Scurry arrived at Cheese Station C and discovered there was 8 cheese. They weren't surprised. 9 they had noticed the supply 10 cheese had been getting smaller every day, they were prepared for the result. They set out quickly to 11 new cheese. Later that same day, Hem and Haw arrived. "What? No cheese! Who moved my cheese?" Hem yelled. They went home that night 12 and discouraged. The next day Hem and Haw 13 to Cheese Station C. But the situation hadn't changed. Haw asked, "Do Sniff and Scurry know something we don't know?" Hem 14 him and said, "What would they know? They are simple 15 and we are human beings. They cannot be 16 than we are." Haw suggested, "Maybe we should 17 talking about the situation and just look for some new cheese." Haw decided to 18 Cheese Station C while Hem was more comfortable staying in the cheeseless Station C. Meanwhile, Sniff and Scurry went farther 19 they found Cheese Station N. They found what they had been looking for. It was the biggest 20 of cheese the mice had ever seen. ( )1. A. feeling ( )2. A. get ( )3. A. happy ( )4. A. humans ( )5. A. put in ( )6. A. where ( )7. A. firstly ( )8. A. some ( )9. A. For ( )10. A. with ( )11. A. search for ( )12. A. glad ( )13. A. returned ( )14. A. smiledat ( )15. A. animals ( )16. A. morefoolish( )17. A. start ( )18. A. leave ( )19. A. if ( )20. A. store B. idea B. avoid B. angry B. dogs B. took off B. that B. suddenly B. no B. If B. of B. find B. hopeful B. left B. laughed at B. cheese-lovers B. bigger B. stop B. go B. unless B. factory C. worry C. follow C. full C. mice C. gave in C. which C. finally C. any C. Though C. for C. look after C. unsatisfied C. walked C. blamed C. thieves C. smarter C. get C. move C. when C. company D. hope D. try D. worried D. cats D. put on D. what D. always D. much D. Since D. to D. discover D. excited D. ran D. praised D. Sniff and Scurry D. faster D. enjoy D. start D. until D. home 查看答案
题型：单项选择题 列关于肾性高血压的发生机制描述不妥的是A．按发生机制分为容量依赖型高血压和肾素依赖型高血压B．容量依赖型高血压是由水钠潞留导致血容量增加引起C．肾素依赖型高血压是由于肾素-血管紧张素-醛固酮系统被激活引起D．肾性高血压绝大多数是肾素依赖型E．限制水钠摄人或增加水钠排泄可改善容量依赖型高血压 查看答案