测量电容器绝缘电阻读数完毕后，正确做法是（）。
A.停止摇动摇把→取下测试线
B.取下测试线→继续摇动摇把
C.取下测试线→停止摇动摇把
参考答案：C
根据短文内容填空。
My grandfather is already sixty years old. But he has only fifteen birthdays. Do you know why?
When is his birthday?
Keys: His birthday is on February 29th. It's a leap(闰年)year every four years. So he has only
fifteen birthdays.
1．An interesting______.
2. My grandfather is______years old.
3. He has only______birthdays.
4. His birthday is on______
5. A leap year happens(发生)every ______ years.
How about a kite with me?
A．fly B．to fly C．flying
