重整催化剂遇硫会中毒,因此预加氢催化剂可以预硫化。而重整催化剂不需硫化。
参考答案:错
() ghost exists in the world. That's your illusion.
A.No such a thing as
B.No such a thing as a
C.No such thing as a
D.No such thing as
下列属于中国外汇储备组成部分的是()。
A、巨额贸易逆差
B、外国直接投入的大幅增加
C、外国贷款的持续增多
D、人民币贬值