汽油发动机CO超标的可能原因是()。 A.油管堵塞 B.空气滤清器堵塞 C.进气管漏

题型:单项选择题

问题:

汽油发动机CO超标的可能原因是()。

A.油管堵塞

B.空气滤清器堵塞

C.进气管漏气

考点:机动车维修技术汽车空调系统汽车空调系统题库
题型:单项选择题

It is well-known that ____ year 2006 saw many developments in ____ science and technology, with those in the field of space science being particularly notable.

A./; /

B.the; /

C.the; the

D./; the

题型:单项选择题

* * 球部破裂流血不止,应采取什么方法治疗()

A.膀胱穿刺

B.留置导尿

C.膀胱造瘘

D. * * 修补术

E. * * 会师术

题型:单项选择题

This booklet is designed to help you and your family plan for and survive a major earthquake. By taking action to be prepared, you can lessen the impact of an earthquake on your family. Set aside some emergency supplies, and teach your family what to do at home during and after a disaster. You could be without help for up to 72 hours, so learn to cope for at least that long.

Movement of the ground is seldom the actual cause of death or injury. Most casualties(意外) result from partial building collapse and falling objects and debris, like toppling chimneys, falling bricks, ceiling plaster, and light fixtures. Many of these conditions are easily preventable.

Because earthquakes occur without warning, it’s important to take steps now to prepare, so that you know what you can do and how to respond — constructive, protective action is possible.

Have on hand for Any Emergency – Ideas for Home, Workplace, and Car.

Because you don’t know where you will be when an earthquake occurs, prepare a disaster supplies.

59.Who is the passage mainly written for ?

A.scientists B.parents     C.the public        D.teachers

60.How can we lessen the impact of an earthquake on our family?

A.Stay at home

B.Keep away from high buildings

C.learn some knowledge about the cause of earthquakes

D.know what to do in a disaster

61.What will the writer talk about next?

A.emergency supplies        B.first aid

C.toppling chimneys      D.ceiling plaster

62.which can be the best title of this passage?

A.Are You Prepared for the Next Earthquake 

B.Earthquakes Occur without Warning

C.How to prevent earthquakes           

D.Cause of Earthquakes

题型:单项选择题


矿山安全技术

独头巷道发生火灾时,不可以采取的措施是( )。

A.维持局部通风机正常通风的情况下,积极灭火

B.立即开启停止运转的风机

C.保持独头巷道的通风原状,即风机停止运转的不要随便开启

D.保持独头巷道的通风原状,风机开启的不要盲目停止

题型:单项选择题

提出白矮星质量有上限的是:()

更多题库