爆炸品叠氮银受()易于分解,所以保管时必须放在背光的库房里。
A、光照
B、加热
C、撞击
D、潮湿
参考答案:A
期货公司经营期货经纪业务又同时经营其他期货业务的,应严格执行业务分离和资金分离制度,不得混合操作()。
Almost all of his time ______ experiments, he has no time to visit his parents.
A.devoted to do
B.devoting to doing
C.devoted to doing
D.is devoted to doing