题目内容

以下不可作为双向变量泵使用的是

A. 齿轮泵
B. 单作用叶片泵
C. 轴向柱塞泵
D. 径向柱塞泵

查看答案

搜索结果不匹配？点我反馈

更多问题

A. 定量
B. 变量

A. On foot.
B. 2 hours.
C. It's warm.
D. 5 days a week.

A. There are two bus stops.
B. You can get there by bus.
C. You can take Bus No. 6.
D. It is very far from here.

A. I'm sorry to disturb you.
B. I want to go to Beijing Park.
C. I want to see you in the park.
D. That's very kind of you.