()是表现某一设备内部各种电器元件之间连线的图样,它是与电气原理接线图相对应的一种图样。
A.安装接线图
B.电气原理图
C.电气系统图
D.电气控制图
参考答案:A
根据句意及首字母提示补全下列单词,使句子完整。
1.After school, the teachers often gives us some h______ to do.
2.In summer, many s swim in that lake.
3.The students can get books from the school 1_______.
4.We do morning e at 8:00 a.m. every day.
5.The boy's mother s two hours watching TV every day.
下列物质暴露在空气中,质量会减小的是( )
A.生石灰
B.浓氨水
C.浓硫酸
D.烧碱