热继电器是利用()不同的双金属片在受热后发生弯曲的特性,来断开控制回路的。()A、热

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问题:

热继电器是利用()不同的双金属片在受热后发生弯曲的特性,来断开控制回路的。()

A、热膨胀系数 

B、导电性能 

C、电阻值 

D、开关特性

考点:变电检修工考试变电检修中级工变电检修中级工题库
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世界四大文明发祥地最西边的是: [     ]

A.长江中下游地区

B.印度河谷地

C.尼罗河流域

D.美索达米亚平原

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将5名志愿者分配到3个不同的奥运场馆参加接待工作,每个场馆至少分配一名志愿者的方案种数为(  )

A.540

B.300

C.180

D.150

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分析《雷雨》中蘩漪的形象

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阅读理解。

阅读下面短文,用英语简要回答文后所给的5个问题。

     I remember a time I went shopping on my first visit to Macau. Coming from cold and cloudy England, I

was prepared for the sun and dressed in a T-shirt and a short skirt. Not having much chance to enjoy the sun

in the UK and having naturally fair skin, my legs are very white. In the UK this is not a fashionable (时尚的)

look at all. Most women spend every sunny day out in the sun trying to get darker skin. The darker the skin,

the better the look.

     As I walked around one shop, two shop assistants didn't take their eyes off me the whole time, talking

quietly in Chinese. I began to feel uncomfortable and asked my friend if we could leave. After we left the shop,

she asked me what was wrong. I was embarrassed that they were talking about my white skin. My friend

laughed."They weren't laughing at you. They were saying how nice your legs are. Many Chinese women want

to have white skin like yours. In fact, there are many beauty products in the shops to make skin whiter and a

lot of money is spent on them."

     It just goes to show that we always think what others have is better. The grass is always greener on the

other side. If the women of the West and East thought the same way, Western women wouldn't spend so

much money on cream that makes skin darker and women from the East wouldn't need to use cream that

makes skin whiter.

1. Where did the story happen?

____________________________________________________________________

2. What kind of skin do most British women prefer to have?

____________________________________________________________________

3. Why did the writer think the shop assistants were laughing at her?

____________________________________________________________________

4. What were the shop assistants talking about?

____________________________________________________________________

5. What does the underlined sentence "The grass is always greener on the other side" mean?

____________________________________________________________________

题型:单项选择题

在一定抽样平均误差的条件下,通过( )可以提高抽样推断的可靠性。

A.扩大样本容量

B.扩大极限误差

C.缩小样本容量

D.缩小极限误差

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