题目内容

A centrifugal pump produces flow with a resulting discharge head by energy conversionIt is

A. mechanical energy to kinetic energy to potential energy
B. mechanical energy to potential energy to kinetic energy
C. potential energy to mechanical energy to kinetic energy
D. kinetic energy to mechanical energy to potential energy

查看答案

搜索结果不匹配？点我反馈

更多问题

胶质瘤不包括()

A. 星型细胞瘤
B. 少突胶质瘤
C. 脑膜瘤
D. 室管膜瘤
E. 髓母细胞瘤

客户身份资料，自业务关系结束当年或者一次性交易记账当年计起至少保存()年。

A. 2
B. 3
C. 4
D. 5

降香的功效是

A. 凉血止血
B. 温中止血
C. 化瘀止血
D. 温经止血
E. 收敛止血

The motor doesn’t work. I’ll call the __________ to check it.

A. Chief Engineer
B. motorman
C. electrician