题目内容

根结线虫病用40%克线磷1000倍液喷在感病植株上,即可收到良好的防治效果

A. 正确
B. 错误

查看答案
更多问题

俯仰电机的特点是()。

A. 间歇工作制
B. 连续工作制
C. 一般选用30MIN工作制
D. 一般选用5MIN工作制

Dangerous goods required to be “carried on deck only” should not be carried on closed vehicle decks,but may be carried on open vehicle deck when authorized by the competent authority concerned. ()

A. under deck
B. on deck
C. ondeck only
D. under deck only

在水泵设计中,为何单纯用增大叶轮外径的方法来提高叶轮所产生的扬程是不足取的?

How long warning must be provided by the CO2 warning Mann before CO2 is discharged into a space ().

A. 5 seconds
B. 10 seconds
C. 15 seconds
D. 20 second

答案查题题库