【判断题】[判断题]外啮合齿轮泵的特点有结构紧凑流量调节方便。
【单选题】第一节 补全对话 (10分) 用方框中所给的B、C、D、E五个句子完成下列对话(每空2分,共10分) A: Why not go online and buy your dress now? B: What’s on your shopping list? C: What’s your plan for the afternoon? D: I know a good shopping ...
A.
Why not go online and buy your dress now?
B.
What’s on your shopping list?
C.
What’s your plan for the afternoon?
D.
I know a good shopping website.
E.
Would you like to go shopping with me?
【简答题】外啮合齿轮泵的特点有( ) A. 结构紧凑.流量调节方便 B.通常采用减小进油口的方法来降低径向不平衡力 C. 噪音较小.输油量均匀,体积小,重量轻 D. 价格低廉,工作可靠,自吸能力弱,多用于低压系统 ,,,
【单选题】外啮合齿轮泵的特点有
D.
价格低廉,工作可靠,自吸能力弱,多用于低压系统
【简答题】(T=Tom, J=Jack) T: Hi, Jack.J: Hi, Tom.T: (31)______J: I’m going to stay at home. What about you? T: (32)______ J: Oh! So you should get up early on Sunday.T: Yes. We are going shopping for some food ...
【单选题】外啮合齿轮泵的特点有()。
C.
可采用减小进油口截面的方法来降低径向不平衡力;