I saw him _______ out of the room. [ ]
A. go
B. had gone
C. has gone
D. goes
答案:A
洗钱行为和洗钱罪有何区别?
对汽油来说,最理想的组分是()。
A.正构芳烃
B.高度分支的异构烷烃
C.芳香烃
D.异构烯烃