放置SF6气瓶的地方应：（）
A、阴凉干燥
B、门窗密闭
C、敞开
D、通风良好
参考答案：A, C, D
After the flood, what we did first was to provide for the homeless families.
A．equipment
B．accommodation
C．furniture
D．position
KP-2A型控制箱中发电机过压保护电路整定值为63V。（）
