不属于有限空间作业前隔离的方式有()。 A.关闭管道阀门,并加设盲板 B.封堵隧道的

题型:单项选择题

问题:

不属于有限空间作业前隔离的方式有()。

A.关闭管道阀门,并加设盲板

B.封堵隧道的通风口

C.使用充气管塞封堵污水管线

D.切断反应釜搅拌器的电源

考点:有限空间作业有限空间作业题库
题型:单项选择题

Blue Ocean Aquarium(蓝色海洋水族馆) is a great place for families to take a holiday. Children love to see the sea animals and watch films about sharks(鲨鱼)in it.

Last Saturday morning, Mr Jackson took his wife and two little sons to the aquarium. At the ticket office, he asked, "How much shall I pay(付款) to get in?" The woman at the ticket office answered, "The price is 20 dollars for each adult or any kid(小孩) older than five. We let kids in free(免费) if they are five or younger. How old are your kids?" Mr Jackson said, "The older one is six and the younger one is three.  I think I must buy three tickets. " The woman was surprised. She said, "Sir, don't you want to save(节省) 20 dollars? If you tell me your older son is five, I won't know the difference. " Mr Jackson said with a smile, "Yes, that sounds right, but my kids will know the difference. "

From Mr Jackson' s story, we know honesty is very important in the modern society(在现代社会). We should tell the truth(事实) to the people around us, especially(尤其是) to the kids.

小题1:Mr Jackson spend     on their tickets to the aquarium at last.

A.20 dollars

B.40 dollars

C.60 dollars

D.80 dollars小题2:Children can see      in Blue Ocean Aquarium.

A.dolphins

B.lions

C.giraffes

D.tigers小题3:The word “honesty” means     .

A.激情

B.友谊

C.乐观

D.诚实小题4:What can we learn from the passage?

A.Mr Jackson was very rich.

B.Mr Jackson wanted to save s ome money.

C.Mr Jackson paid for his two son’s tickets at last.

D.Mr Jackson thought honesty was more important than money.

题型:单项选择题

一个人站在阳台上在同一位置,以相同的速率分别把三个球竖直向上抛出,竖直向下抛出,水平抛出,不计空气阻力.则三球落地时的速度大小(  )

A.上抛球最大

B.下抛球最大

C.平抛球最大

D.三球一样大

题型:单项选择题

日光灯电路中串入的镇流器除限制电流外,还能产生()使灯管导通。

题型:单项选择题

甲级设备监理单位注册资金不得少于()万元。

A.50 

B.100 

C.300 

D.500

题型:单项选择题

驾驶舱门框上的锁槽内共有几个微动电门?

A、3

B、4

C、5

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