重整催化剂氮中毒的实质是氨与催化剂上的()反应,减少了()的数量。
A、铂,酸性活性中心
B、氯,金属活性中心
C、铂,金属活性中心
D、氯,酸性活性中心
参考答案:D
Do you play basketball?
A.a
B.an
C.the
D./
— They will ________ in their car.
— No. They said they wouldn't _____. [ ]
A. give you a lift; take me for a ride
B. lift you; offer me a ride
C. offer you a ride; give me a lift
D. ride you; give me a ride