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完形填空。 I have a good mother. She has always made sure we eat very 1 . We live 2 the sea and have fish about four times a 3 . We eat fresh fruit and vegetables every day. We don't eat 4 sugar or fat (脂肪). A lot of my school friends eat many sweets every day but I only eat a few. And I'm not too heavy, so I 5 have to be thinner. I'm quite healthy. I don't often get cold, 6 I had a bad cold and a high temperature last week because I played football in the 7 I don't often get things 8 flu (流感) either. Last winter almost all my classmates got flu-but I didn't. I don't get these things 9 I take a lot of exercise and I am very 10 . Two years ago I broke my 11 while I was playing football and I couldn't 12 my arm for a month. So as you can 13 from what I've said, I'm an 14 person. But there's one thing I really love playing football. I'm captain of the class team at school. Because of this, I must have a good diet (饮食), and as I've said, this isn't a problem because my mother 15 us so well. (     )1. A. slowly (     )2. A. in (     )3. A. day (     )4. A. much (     )5. A. sometimes (     )6. A. so (     )7. A. rain (     )8. A. for (     )9. A. because (     )10. A. busy (     )11. A. foot (     )12. A. open (     )13. A. hear (     )14. A. ordinary (     )15. A. feeds B. safely B. under B. week B. any B. often B. but B. sun B. like B. while B. tall B. arm B. pull B. see B. important B. trains C. healthily C. above C. month C. delicious C. always C. and C. field C. of C. if C. helpful C. hand C. move C. write C. interesting C. invites D. quickly D. near D. year D. good D. never D. for D. forest D. with D. when D. strong D. head D. find D. describe D. exciting D. interviews
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参考答案:
举一反三
【判断题】艺术的创造可以归纳为:直观-表象-抽象概念-理论。
A.
正确
B.
错误
【判断题】确定接收机性能的一个重要参数是接收机灵敏度,它通常定义为在接收机BER≥10 -9 的条件下,所要求的最小平均接收光功率。(    )
A.
正确
B.
错误
【单选题】光接收机的灵敏度是指
A.
光接收机所需要的最小接收光功率
B.
满足给定信噪比指标的条件下,光接收机所需要的最小接收光功率
C.
光接收机接收弱信号的能力
D.
满足给定信噪比指标的条件下,光接收机所需要的最接收光功率
【判断题】判断下列说法是否正确 (5)共集放大电路的电压放大倍数是小于1,故不能用来实现功率放大。
A.
正确
B.
错误
【单选题】船舶少量载荷增加后,首吃水增大0.4m,尾吃水减小0.2m,则吃水差改变 m。
A.
0.2
B.
0.4
C.
0.6
D.
0.8。
【判断题】光接收机的灵敏度是光接收机所能接收的最小平均接收光功率Pmin。
A.
正确
B.
错误
【单选题】光接收机的灵敏度是指:
A.
A光接收机所需要的最小接收光功率
B.
B满足给定信噪比指标的条件下,光接收机所需要的最小接收光功率
C.
C光接收机接收弱信号的能力
D.
D满足给定信噪比指标的条件下,光接收机所需要的最接收光功率。
【单选题】电脑开机自检时,最先检查的部件为()
A.
显卡
B.
CPU
C.
内存
D.
主板
【判断题】在女子防身术的使用中第一次出手可以有试探性行为
A.
正确
B.
错误
【简答题】确定接收机性能的一个重要参数是接收机灵敏度,它通常定义为在接收机______的条件下,所要求的最小平均接收光功率。
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