丙烯塔建立循环时没有赶尽的氮气会影响丙烯塔的压力,同时会严重影响()质量。
A、丙烷
B、丙烯
C、异丁烷
D、正丁烷
参考答案:B
---- Is there anything about your high school life you wish you’d done differently?
---- I regret that I ______ earlier what I really like doing.
A.don’t realize
B.didn’t realize
C.haven’t realized
D.hadn’t realized
下列除哪项外均为呕吐的治疗原则()
A.温中化饮,和胃降逆
B.消食化滞,和胃降逆
C.疏邪解表,化浊和中
D.疏肝理气,和胃降逆
E.温中健脾,和胃止痛