图中为同一组散热器,当进出水温度和室内温度相同,而接管方式不同时,试比较其传热系数的

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问题:

图中为同一组散热器,当进出水温度和室内温度相同,而接管方式不同时,试比较其传热系数的大小。

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斗轮机俯仰时油路振动的原因?

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分解因式:a2b-2ab2+b3=______.

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Top lists are lecturing people on everything from “100 books to read”. Aren’t you just tired of being told what to do with your time?

Now you have a list to end all lists!

Take a look at the following two examples from the list of “101 things not to do”:

Swim with Dolphins(海豚)?

Swimming with dolphins is one of the world’s most profitable tourist activities. However, every dolphin will welcome having their busy, tiring day interrupted by tourists screaming pushing around them in the water. Worse yet, when dolphins get too near to the boats loaded tourists, they could get caught up in ropes and killed by propellers(螺旋桨).

Here’s a little secret. Dolphins look like smiling at you, but actually they’re just opening mouths.

Go to See the Mona Lisa?

There must be something about the mysterious(神秘的) smile. The 6 million people who the lady in the Louvre every year can’t all be wrong after all. But they can be quite annoying standing in front of you, holding up their cameras to prevent you from seeing anything. In fact it is hard for you to see the painting clearly because you have to stay away from it for security read. After queuing for hours, many tourists can remain in front of the painting only for 15 seconds most.

If the mysterious lady in the picture knew her fate, she wouldn’t just be smiling, she laughing.

So, still long to see the Mona Lisa? If you want to find out more about the list, read 101 Things NOT to Do Before You Die. Visit www.not2dobeforeidie.co.uk and buy the book at a 20% discount.

小题1:According to the passage, swimming with dolphins              .

A.is the world’s most popular tourist activity

B.gives fun to both tourists and dolphins

C.will make tourists busy and tired

D.can cause danger to dolphins小题2:What does the author think about going to see the Mona Lisa?

A.It is wrong to go and see the mysterious smile.

B.It is not as satisfying as expected.

C.Fifteen seconds in front of the painting is enough.

D.Queuing for hours is worthwhile.小题3:The list of “101 things not to do” is made most probably because its author              .

A.thinks it boring to do the things suggested by other lists

B.believes other lists are not humorous enough

C.intends to persuade people to read more lists

D.wants to provide a list different from other lists小题4:What is the main purpose of the passage?

A.To advertise a book

B.To introduce a website

C.To comment on popular lists

D.To recommend tourist activities

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桥跨结构(也称上部结构)下列关于承重部分说法错误的是()。

A、梁式桥的承重部分为主梁

B、拱桥的承重部分是拱圈

C、桁架桥的承重部分是桁架

D、刚架桥的承重部分是梁或板

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根据国家地区产业结构调整规划,当前我国东部地区产业结构调整的方向之一是( )。

A.加快基础设施建设和基础产业发展
B.发挥资源优势,加大开发力度,变资源优势为经济优势
C.大力发展以电子信息产业为代表的新兴产业和高科技产业,推进国民经济信息化
D.加速房地产业发展,扩大新兴工业区建设

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