为防止锅炉的供暖管线烫伤人员,应采取什么措施?

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问题:

为防止锅炉的供暖管线烫伤人员,应采取什么措施?

考点:中石化钻井一公司关键岗位人员安全考试钻井技术服务司炉工钻井技术服务
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(1)设A={x|x=2k-1,k∈Z},B={x|x=2k,k∈Z},求CZA及CZ(A∪B)

(2)已知A={x|a-4≤x<a+3},B={x|x<2或x>5},且A∩B=A,求a的取值范围.

题型:问答题 简答题

如图所示电阻R2=60Ω,滑动变阻器R1最大值为20Ω.

(1)当开关S1闭合,S2断开,滑片P滑到最右端时,电压表示数分别为4V,12V,求电流表的示数和电阻R1的阻值.

(2)当开关S1S2均闭合,滑片P滑到最左端时,电流表示数为多少?

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以下和隋朝最为类似的朝代是 [ ]

A、西晋

B、秦朝

C、元朝

D、唐朝

题型:问答题 简答题

下列属于青少年健康监测形态指标的是

A.立定跳远

B.上臂围

C.肺活量

D.50米跑

E.引体向上

题型:问答题 简答题

I received pictures of my daughter floating (漂浮) on a lake in California. Right there under the sun during the hottest time of the day, she has only her swimsuit to cover her.

When I showed it to my students, it was as if I had shown them scenes from a horror (恐怖) movie.

“But she will get dark,” they said.

“That’s what she wants,” I told them. “We think darker skin (肤色) is beautiful.”

They looked at me in disbelief. It was as if I came from the moon.

For years, American girls spend their summer trying to get as tanned (晒黑) as possible. In China, on the other hand, girls use umbrellas all year round.

What in the world is going on?

The pale skin we think looks unattractive (不漂亮) is what Asian women want. Both groups want to meet their culture’s standard (标准) of beauty.

In the US, if you can afford to go on vacation in the summer, you head for a river, a lake or a beach, where you try to get as much sun as possible. If you are rich you take a winter vacation in some sunny spot. Your winter tan shows your wealth.

In China, once upon a time, the few wealthy were the ones who didn’t have to work out in the hot sun. So the whiter the skin, the richer the woman. The folk opera performers who play these ladies wore lots of white makeup (妆容). The tradition survives to this day.

So it comes naturally that none of my students wishes to follow the Western ways in this regard.

But now I am noticing that a new business – the tanning booth (美黑店) – started up in China. I admire those brave enough to define(给…下定义)their own idea of beauty, but I do wonder what their grandmothers would have to say to them about it!

小题1:The students were shocked at the picture the writer showed them because ______.

A.they thought it shameful for a girl only to wear a swimsuit

B.the writer’s daughter was wearing very little while out in the sun

C.it is dangerous for a girl to be out on a lake alone

D.with the powerful sunlight the writer’s daughter would have got a suntan小题2: According to the article, which kind of woman meets the American standard of beauty?

A.Women with blond hair.

B.Women with a slim figure.

C.Women with tanned skin.

D.Women with pale skin.小题3: In the US a winter tan usually means the person _____.

A.is hard-working

B.doesn’t have to work

C.has a lot of money and spare time

D.is from a very poor family小题4:The writer ______ the tanning booth started up in China.

A.is not interested in

B.doesn’t understand

C.doesn’t like

D.has mixed feelings about

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