注意到汽车车上设有安全带未系提示系统么？当乘客坐在座椅上时, 座椅下的开关S1闭合，若未系安全带（安全带控制开关S2断开）仪表盘上的指示灯L将亮起，再系上安全带时，安全带控制开关S2闭合，指示灯L熄灭。如图电路图设计最合理的是：
答案：B
题目分析：C中S1与指示灯串联，跟S2并联，当乘客坐在座椅上时，指示灯亮，当系上安全带时，指示灯也亮，不符合题意，D中，S1与S2并联，当乘客坐在座椅上，不管是否系上安全带时，指示灯都亮，不符合题意。A中也是如此选项A不符合题意。而B中S1与指示灯串联，跟S2并联，当乘客坐在座椅上时，指示灯亮，但当系上安全带时，指示灯被短路而熄灭，符合题意，故只有B正确。
| 阅读理解。 |
| Once there was a clever farmer. Though he was poor, he decided one day to take the king a roast goose (烤鹅) as a present. He had not had 1 to eat that day, and soon the 2 of the roast goose became too much for him as (当…时) he 3 it to the king, so he ate one of its legs. When he came before the king and gave him the goose, the king 4 saw that it had only one leg. Now, the king 5 was born with one bad leg, so he had never been able to 6 properly (正常地). When he saw the goose with only one leg, he thought the farmer had 7 this to laugh at him. Of course he was very 8 . The farmer was told that if anybody laughed at the king, he would be 9 at once. "Where is 10 leg of the goose?" the king asked. "All the geese (goose的复数) in this 11 of the country have one leg only," the farmer answered. "Do you think I'm a fool (傻子)?" the king shouted. " 12 ," said the farmer, "if you look out of the window, you will see geese with one leg by the 13 ." The king looked, and there the geese were 14 on one leg beside the water. The king at once told one of his men to 15 them with a big stick, and of course, they 16 their other legs and ran away. "There," said the king. "You were lying (说谎). That 17 that the geese here have two legs, like all other 18 in the country." "But it doesn't show anything," answered the farmer, "if your men threw a big stick like that at me, I would grow two 19 legs myself to help me to run away 20 ." |
| ( )1. A. less ( )2. A. head ( )3. A. returned ( )4. A. at once ( )5. A. once ( )6. A. come ( )7. A. kept ( )8. A. sorry ( )9. A. helped ( )10. A. other ( )11. A. city ( )12. A. Certainly not ( )13. A. hole ( )14. A. swimming ( )15. A. fill ( )16. A. sent up ( )17. A. shows ( )18. A. geese ( )19. A. slower ( )20. A. more slowly | B. all B. neck B. carried B. at last B. really B. walk B. done B. worried B. killed B. another B. village B. Of course B. forest B. resting B. lock B. put down B. talks B. animals B. faster B. more carefully | C. little C. smell C. sent C. by then C. himself C. see C. made C. sad C. saved C. that C. farm C. That's nothing C. lake C. flying C. hit C. did with C. sees C. legs C. less C. faster | D. much D. temperature D. handed D. on time D. yet D. eat D. found D. angry D.covered D. the other D. part D. Never mind D. house D. lying D. keep D. moved away D. knows D. farmers D. more D. Earlier |