隔膜泵巡回检查的内容是（）。A、检查入口管线是否存在漏气 B、_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

隔膜泵巡回检查的内容是（）。

A、检查入口管线是否存在漏气

B、检查泵体轴承温度是否过高

C、检查是否发生汽蚀

D、检查泵体轴承的润滑油油位是否正常

答案

参考答案：A

选择题

—I called on you but you were not in last night.

—Because I ________ supper with my parents in a restaurant. [ ]

A. has had

B. had

C. was having

D. had had

多项选择题

苯丙酮尿症的临床特点是（）

A.爆发、皮肤色泽变浅

B.智力发育落后

C.惊厥

D.尿和汗液有鼠尿臭味

E.肌张力增高