问题
选择题
| 我国是全世界手机用户最多的国家．关于手机，下列说法正确的是（ ） A．手机是利用超声波来传递信息的 B．听筒是利用电磁感应原理工作的 C．作振动用的电动机利用了磁场对电流有力的作用 D．手机周围没有磁场不会对别的磁体造成影响 |
答案
答案：C
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| 我国是全世界手机用户最多的国家．关于手机，下列说法正确的是（ ） A．手机是利用超声波来传递信息的 B．听筒是利用电磁感应原理工作的 C．作振动用的电动机利用了磁场对电流有力的作用 D．手机周围没有磁场不会对别的磁体造成影响 |
答案：C
A boy who was cleaning shoes in the street said to a young man 1 by, “Let me clean your shoes, 2 ?”The young man said, “No, thank you .”“You may 3 me only a pound for that, sir.” said the boy. 4 the young man refused again. Then the boy told him that he would clean his shoes for 5 . The young man agreed to this, and soon one of his shoes was shining brightly. The man put 6 shoe on the boy, but the boy refused to clean it unless he 7 two pounds for his work. The young man refused to pay anything and went away. But one looked 8 dirty that he couldn’t walk away. He had to 9 and gave the boy 10 . In a very short time his shoes shone brightly.
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