心电图上表现为宽QRS波心动过速为() A.伴房室传导阻滞的房扑 B.室性心动过速

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问题:

心电图上表现为宽QRS波心动过速为()

A.伴房室传导阻滞的房扑

B.室性心动过速

C.窦性心动过速伴室内传导阻滞

D.房性心动过速伴室内传导阻滞

E.结性心动过速伴室内传导阻滞

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B


Waste can be seen everywhere in the school. Some students ask for more food than they can eat and others often forget to turn off the lights when they leave the classroom. They say they can afford these things. But I don’t agree with them.
Waste can bring a lot of problems. Although China is rich in some resources (资源), we are short of(缺乏) others, for example, fresh water(淡水). It is reported that we will have no coal (煤) or oil to use in 100 years. So if we go on wasting our resources, what can we use in the future and where can we move Think about it. I think we should say no to the students who waste things every day. Everybody should stop wasting as soon as possible.
In our everyday life, we can do many things to prevent waste from happening, for example, turn off the water taps (水龙头) when we finish washing, turn off the lights when we leave the classroom, try not to order more food than we need, and so on. Little by little, everything will he changed. Waste can be stopped one day, if we do our best.

Which of the following is right ( )

A.Waste brings problems.

B.Waste can bring no problem.

C.China is rich in fresh water.

D.Students never waste things.

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The theory that the impact of a giant meteorite caused the extinction of the dinosaurs is based on evidence that a cloud of dust from the impact blocked off sunlight around the globe for months, reducing temperatures and destroying the dinosaurs’ food supply.
Which of the following, if true, casts the most serious doubt on the theory above

A.Dinosaurs are believed to have been cold-blooded and thus very sensitive to any temperature change.

B.Some dinosaurs lived in regions where their food supply was not well adapted for long periods of cold and darkness.

C.Many large animals that existed during the time of the dinosaurs and shared a common food supply with them continued to populate the Earth long after the extinction of the dinosaurs.

D.A large volcanic explosion that strewed dust in the air and blocked out sunlight was the cause of death of animals within hundreds of miles of the eruption.

E.(E) Many of the largest dinosaurs were herbivorous relying exclusively on vegetation for their dietary needs.

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俄罗斯人非常好客,他们接待客人吃饭桌上摆的是()

A.美酒佳肴

B.西餐

C.鲜花

D.客人喜欢的食品

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热水槽开始温度是()

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公司与个人独资的区别有()

A.财产组成不同

B.法律地位不同

C.投资者享有的权利不同

D.组织机构不同

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