问题
单项选择题
从病原体侵入机体到临床症状出现这段时间称为
A．传染期
B．潜伏期
C．隔离期
D．非传染期
E．以上都不对
答案
参考答案：B
解析：从病原体侵入机体到临床症状出现这段时间称为潜伏期。
搜题请搜索小程序“爱下问搜题”
从病原体侵入机体到临床症状出现这段时间称为
A．传染期
B．潜伏期
C．隔离期
D．非传染期
E．以上都不对
参考答案：B
解析：从病原体侵入机体到临床症状出现这段时间称为潜伏期。
| 完形填空。 | |||
| When Liu Kaiqu was young he was poor in Shanghai. One day he __1__ a picture of a tiger and tried to sell it on the street. It caught the __2__ of an American, who asked, " How much does it cost?" He said,"500 dollars. "The foreigner thought it was too __3__ and asked again," Can you make it cheaper?" He answered, " No. " Then he tore (撕) it to pieces. In great __4__ , the foreigner said, "Young man, are you angry?" " No, sir. I'm not angry. I sold it __5__ 500 dollars because I thought it was worth the __6__ . But you wanted a lower price. It means __7__ didn't think so and it is not good enough. I'll go on working __8__ until my customers (顾客) are satisfied. " At that time, __9__ Liu Kai qu was not famous at all, he never __10__ his dream. Now he is well-known all over the world as a great artist. | |||
| ( ) 1. A. stole ( ) 2. A. attention ( ) 3. A. terrible ( ) 4. A. fear ( ) 5. A. over ( ) 6. A. size ( ) 7. A. we ( ) 8. A. faster and faster ( ) 9. A. though ( ) 10. A. broke off | B. picked B. instruction B. big B. difficulty B. for B. price B. he B. better' and better B. because B. cut up | C. drew C. decision C. old C. surprise C. about C. weight C. you C. slower and slower C. whether C. gave up | D. saw D. discussion D. dear D. excitement D. among D. position D. it D. harder and harder D. until D. sent off |