对于溶液中含铁在1g/l以上的溶液来说,采用()除铁有相对的优越性。
A、黄钠铁矾法
B、氧化中和水解
C、置换
D、萃取
参考答案:A
Henry has been looking forward to ________ his present for days, so now all that he’s looking
forward to is ________ whether his father is back home.
A.see; seeing
B.seeing; seeing
C.seeing; see
D.see; see
定量安全评价方法有( )等。
A.安全检查表法
B.危险度评价法
C.作业条件危险性评价法
D.道化学火灾、爆炸指数评价法
E.故障类型和影响分析法