试题与答案

硅在硅钢片中的生要作用是()。 A.降低磁滞损耗,提高导磁率 B.增强绝缘性能 C.

题型:单项选择题

题目:

硅在硅钢片中的生要作用是()。

A.降低磁滞损耗,提高导磁率

B.增强绝缘性能

C.提高磁滞损耗,降低导磁率

D.提高导电性

答案:

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参考答案:1689年通过《权利法案》确立君主立宪制,限制君主权力;18世纪中期形成责任内阁制,国王“统而不治”;通过1832年议会改革法案,工业资产阶级分享政治权利。解析:“光荣革命”后至19世纪中期,这是一...

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题型:阅读理解

阅读理解。

     No one can change the weather. But if we read correctly the signs around us, we can tell how

the weather will be. This way of telling of what the weather will be like on the following day or two is

called weather forecasting. For many centuries and in all countries, people have studied the weather

and tried to make weather forecasting. Rings around the sun are a sigh of coming rain. Many people

feel in their bones the coming of wet weather, their joints ache. Some birds fly high if fine weather is

coming, but they fly near the ground if rainy or stormy weather is on the way. It is probably because

of the insects which they are hunting that they fly low. If you see a rainbow during rainy weather, this

is a sign that the weather will become clear and fine. Such rainbows come in the evening. If the stars

twinkle clearly at night, then fine weather will continues. If a fog appears in the morning just above a

river, then the day will be warm. If the sunset is mostly red in color, then the following day will be

warm. If a rainbow appears in the morning, rainy weather will probably come. Most of the above

saying have been made by the people who have used their eyes and brains to make weather

forecasting.

1. People's joints ache _______.

A. is a sign of coming rain      

B. without any reason  

C. because they are ill          

D. because of the insects

2. Which is true about weather forecasting?

A. Weather forecasting is a report about the weather on the following day or two.

B. Weather forecasting is a way of telling what the weather will be like.

C. Weather forecasting is a sign of coming rain.

D. People can change the weather forecasting.

3. The birds fly high and the stars twinkle clearly is a sign that the weather will _______.  

A. be warm    

B. be rainy      

C. become clear and fine   

D. be cold

4. A rainbow is a _______ of the fine weather.  

A. sign      

B. way      

C. method      

D. road

5. We must _______ to make weather forecasting. 

A. use our eyes and brains      

B. study the weather hard

C. read correctly signs          

D. All of the above

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