问题
单项选择题
信号电源使用电缆供电时，要考虑电缆芯线间的分布电容形成串电的问题，应尽可能地使用（），必要时应分开电缆供电。
A.直线地缆
B.铝芯电缆
C.铜芯地缆
D.扭绞电缆
答案
参考答案：D
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信号电源使用电缆供电时，要考虑电缆芯线间的分布电容形成串电的问题，应尽可能地使用（），必要时应分开电缆供电。
A.直线地缆
B.铝芯电缆
C.铜芯地缆
D.扭绞电缆
参考答案：D
| 完形填空。 | |||
| Once a neighbor 1George Washington's horse.Washington went with apoliceman to the neighbor'sfarm 2 the horse back.But the neighbor refused 3 the horse back.He said that it was his horse. SuddenlyWashington 4 good idea. He put both of hishands over the eyes of the horse and 5 theneighbor, "If this is your horse, then you 6 tell us in _7 eye he is blind. " "In the right eye," said the neighbor. Washington moved his hand from the righteye of the horse and showed the policeman thatthe horse was not blind in the right eye. "Oh, I made a mistake," said the neighbor. Washington then showed that the horsewas not blind in the left eye,_8 . "I have made 9 mistake," said the neighbor. "Yes," said the policeman, "and you havealso proved(证明) that the horse isn't 10 .You must return it to Mr. Washington. " | |||
| ( )1. A. steals ( )2. A. bring ( )3. A. take ( )4. A. had a ( )5. A. told ( )6. A. may ( )7. A. what ( )8. A. too ( )9. A. another ( )10.A. his | B. stolen B. getting B. to take B. has an B. said to B. must B. that B. also B. other B. you | C. stole C. to get C. to give C. found C. asked C. need C. which C. either C. the other C. your | D. has stolen D. to take D. giving D. had an D. asked to D. had to D. how D. neither D. again D. yours |
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