脱轻塔再沸器壳程内物料的名称是()。
A、MTBE
B、异丁烯
C、中压蒸汽
D、低压蒸汽
参考答案:D
--Why not _______ to London for holidays?
--Good idea.
A.consider going
B.to considering going
C.consider to go
D.considering going
在同一个圆里.周长和直径的比是______:______.