波在沿架空线传播过程中发生衰减和变形的决定因素是()。 A.导线电阻 B.导线对地电

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问题:

波在沿架空线传播过程中发生衰减和变形的决定因素是()。

A.导线电阻

B.导线对地电感

C.导线对地电容

D.电晕

考点:电气试验工考试电气试验高级技师电气试验高级技师题库
题型:单项选择题

We’ve talked about snails (蜗牛) and their slow move. But much of the time snails don’t move at all. They’re in their shells ---sleeping .

Hot sun will dry out a snail’s body. So at the least sign of hot sun, a snail draws its body into its shell and closes the opening with a thin cover. Then it goes to sleep. A snail will die in a heavy rain. So whenever it rains, it goes inside its shell house and goes to sleep. A snail can sleep for as long as it needs to. It can take a short sleep. Or it can sleep for days at a time. And it spends all the winter months in its shell, asleep.

In spring the snail wakes up. Its body, about three inches long, comes out of from the shell. When hungry, the snail looks for food. It can’t see very well. Its eyes, at the ends of the top feelers are very weak. But its sense of smell is very strong. It helps the snail to the new greens. Then the snail’s little mouth goes to work.

A snail’s mouth is no longer than the point of a pin(针). Yet it has 256,000 teeth! The teeth are so small that you can’t see them. But they do their work.. If you put a snail in a hard paper box, it will eat its way out. And if a snail wears out its teeth, it will grow new ones.

Mostly, a snail looks for food at night .But on cloudy days it eats in the daytime. It eats all day long. A snail can go on eating for hours and never feel full.

小题1:A snail__________.

A.moves more slowly in the daytime

B.has thousands of feet

C.doesn’t move at all

D.sleeps much of the time小题2:In the sentence “A snail draws its body into its shell” the word “draw” means_________.

A.to make with a pen

B.to keep away from

C.to pull

D.to move to end小题3:From the story we know_________.

A.the snail’s shell is very thin

B.a snail can’t see well

C.the snail’s nose is quite short

D.the snail’s body changes in different seasons小题4:A snail goes to sleep when_________.

A.it feels hungry

B.it is put in a paper box

C.spring is coming

D.it rains heavily小题5:Which of the following in not true?

A.A snail doesn’t like living under the sun.

B.In winter the snail doesn’t eat or move.

C.The snail’s teeth can’t be worn out..

D.The snail’s strong sense of smell helps to find things far away.

题型:单项选择题

隐匿性传导最常见的部位为()

A.窦房结

B.房室结

C.希氏束

D.心房肌

E.心室肌

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某房地产企业计划一季度在本公司A、B、C三个地区市场按4000元/m2,5000元/m2、6000元/m2的价格销售商品房2000m2、2500m2、3000m2,但季末检查的情况是A地区以3900元/m2的价格售出2300m2,B地区以4600元/m2的价格售出2200m2,C地区以6000元/m2的价格售出3300m2

在销售现场管理中,房号管理应遵循( )原则。

A.客户满意

B.诚意表示可视同成交

C.以客户办理定房手续作为销控房号的标准

D.方式交易后,应停止向客户推荐此房号

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酵母菌的形态、大小和结构

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轻度的换档冲击通常是由于()和()间隙过大造成的。严重的换档冲击通常是由于()卡滞或控制阀中()发生卡滞造成的。

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