题目内容

气相色谱仪的基本结构是什么?

查看答案
更多问题

干燥器初次加热起跳温度为()

A. 250℃
B. 300℃
C. 350℃
D. 400℃

仅受径向载荷时选用推力轴承。

A. 正确
B. 错误

It was demanded that the injured crewmembers()at once.

A. was treated
B. would be treated
C. being treated
D. be treated

滑动轴承由滑动轴承座、轴瓦或轴套组成。

A. 正确
B. 错误

答案查题题库