下列药物对胎儿的危害属于D类药物有()。
A.金霉素
B.氯苯那敏
C.氮芥
D.卡那霉素
E.布洛芬
参考答案:A, C, D, E
对于沸点不低于45o的烃类液体流散的或不大于100㎡的流淌火灾,中倍数泡沫混合液供给强度应大于()。
A.2L/min·㎡
B.3L/min·㎡
C.4L/min·㎡
D.5L/min·㎡
He stopped his ears with his hands to _____ the terrible noise.
A.show off
B.cut out
C.keep from
D.shut out