对于旋转电器不准使用()和()灭火。
参考答案:泡沫灭火器;砂土
After the party, the boy apologized to the girl for the trick he had _____ on her. [ ]
A. taken
B. played
C. undertaken
D. conducted
衡量灾情大小的标准是( )
A.致灾因子强度
B.人类社会和自然资源的损失
C.孕灾环境大小
D.人类伤亡和财产损失的数量