开孔刀的刀齿一般由()个构成一组。A、1 B、3 C、4 D、5

题型:单项选择题

问题:

开孔刀的刀齿一般由()个构成一组。

A、1

B、3

C、4

D、5

考点:压力管道作业带压封堵带压封堵题库
题型:单项选择题

下列叙述正确的是(  )

A.硫酸钡难溶于水,但硫酸钡是电解质

B.稀H2SO4溶液能导电,稀H2SO4是电解质

C.H2SO4在电流作用下在水中电离出H+和SO42-

D.氯气的水溶液能导电,所以氯气属于电解质

题型:单项选择题

请仔细阅读小题,从A、B、C、D中找出其相对应的选项,并回答第5小题。

You don’t have to be bored on a rainy day. Here are some new ideas:

Tell stories. You might tell stories you have heard before, or you might make up some really wonderful stories.

小题1: You can learn to cook a pizza or maybe some cookies. Give your friends a chance to help in the kitchen and make something tasty.

小题2:You might write stories on your own and then read them aloud to others, or you might write a story together.

小题3:Think of some scenes and then play a game. Act as teachers, doctors, nurses or policemen. You can dress up in whatever you may have.

小题4:Pick out some music and dance around in the room. You can also sing while others are dancing.    

So on the next rainy day, try some of these ideas for a day full of fun!

A.Cook in the kitchen

B.Play “Let’s act” game

C.Write a story together

D.Have a party小题5:This passage is mainly about ___________

A.How to tell and write stories

B.How to play a game

C.How to spend a rainy day

D.How to make something tasty

题型:单项选择题

读图回答.

(1)填出人口稠密区A______,B______,这里是人类______生产发展最早的地区.

(2)填出人口稠密区C______,D______,这里是现代______生产最发达的地区.

(3)下列人口稀少区的气候类型名称是:E处于______气候,F处于______气候,G处于______气候,H尚未定居人口的原因是______.

题型:单项选择题

What would you do if you cut yourself _        .               [ ]

A. by mistakes      

B. by accident      

C. by change

题型:单项选择题

据《素问·汤液醪醴论》,中古之世做汤液醪醴是()。

A.为而不用,以为备耳

B.服之万全

C.服之亦不必已

D.配合针石

E.配合薰浴

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