蓄电池室应在设备安装前完善（）设施。蓄电池安装过程及完成后室内禁止烟火。
A.防爆
B.通风
C.取暖
D.照明
E.防毒
参考答案：B, C, D
It is ______ for children to learn to take care of themselves if they are going to camp for two weeks
by themselves. [ ]
A. aware
B. fundamental
C. active
D. reliable
保持正常水位的重要意义是什么？
