为预防触电,电气设备应有的安全保护有()。
A、保护接地
B、短路保护
C、过负荷保护
D、过压保护
参考答案:A
— Would you like to go for a picnic to enjoy the fresh air outside this weekend?
— __________. It will be a funny day.
A.I’d love to
B.Don’t mention it
C.No, I won’t
D.It doesn’t matter
照明灯具的扳把开关距地面高度应为1.2~1.4m。