保险丝的选用应与电表的额定电流相匹配,一般用铜丝或铁丝充当。
参考答案:错
解析:保险丝不能用铜丝或铁丝充当
选择画线部分的正确词意,将序号填入括号内。
1. Today is Mike's birthday. Many of Mike's friends are in his house. They are having a good time.[ ]
A. 吵吵闹闹
B. 有很好的时间
C. 有很多时间
D. 过得很愉快
2. The gardener is cleaning the flower bed.[ ]
A. 花丛
B. 花坛
C. 绣花床
D. 花床
3. There are 365 days in a year. And 100 years is a century.[ ]
A. 年
B. 季节
C. 月
D. 世纪
4. Iraq, Iran and Kuwait are countries. They are in West Asia.[ ]
A. 东欧
B. 北非
C. 西亚
D. 南美
5. The population of China is about 1, 300, 000, 000.[ ]
A. 面积
B. 高度
C. 长度
D. 人口
-How come your father can read books in German?
-Well, he _______ on a project with some German engineers for 3 years when he was young. [ ]
A. worked
B. has worked
C. had worked
D. would work