煤矿常用的油泵按结构可分为（）类。
A.2
B.4
C.6
D.8
参考答案：A
情景选择。
1. 当你想问大家“谁饿了？”时，你应说：[ ]
A. Who are hungry?
B. Who is hungry?
C. Are you hungry?
2. 当你想表达“你想吃些什么呢？”时，你应问：[ ]
A. What you like to eat?
B. What would you like to eat?
C. Would you like some food?
甘露消毒丹治疗湿阻，其治法体现了（）
A.健脾益气
B.理气和胃
C.清热利湿
D.芳香化浊
E.清热解毒
