考虑腹板屈曲后强度的梁和普通梁的不同,体现在哪些地方?

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问题:

考虑腹板屈曲后强度的梁和普通梁的不同,体现在哪些地方?

考点:二级结构工程师专业知识钢结构钢结构题库
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监控双香豆素类口服抗凝剂PTINR应控制在()

A.1.5~2.0

B.2.0~3.0

C.1.5~3.0

D.2.0~5.0

E.3.0~5.0 

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阅读理解。

     People at home keep asking me, "Is it hard to learn Chinese? Why have you learned it so well?" Well,

there's one thing that makes Chinese easy to learn: there are so many people to talk to. You've probably

heard that it's the most spoken language. Today it's also one of the most written languages online. And

with so many Chinese people interested in learning English, it couldn't be easier to find a friend for language

learning. You just have to know where to look for them.

     The really good place to look for them is QQ. QQ has the same status (地位) in China as AIM (AOL

Instant Messenger) does in the US. It is reported that at any moment, up to 9,000,000 people are using

QQ. They're at work, or in a web café (网吧), or at home, and the information of the users can be found.

If you sign on with your address set to"abroad", you'll soon find that many thousands of them are interested

in speaking to you! This is a great way for you to learn Chinese, and for them to learn English. I think that

it's a very interesting way of cultural contact (文化交流), too, for ordinary people from around the world

to be able to have one-on-one contact.

1. In the first paragraph (段落), the writer tells us _____.

A. why his family members want to learn Chinese

B. where you can find people to talk to for language learning

C. the easiest thing to do is learning Chinese

D. Chinese isn't so hard to learn as his friends think

2. From the second paragraph we know that QQ and AIM are _____.

A. addresses for the Internet users

B. documents you need to get online

C. tools for people to talk online

D. programmes of a computer 63. Offices, web cafes and homes _____.

A. attract the most people to learn Chinese

B. provide both QQ and AIM in China

C. are the best places for English learners

D. have the most people online

4. The writer wrote this passage mainly to _____.

A. tell a way of learning Chinese

B. show what the Chinese people are doing

C. tell the important of learning Chinese

D. show the difference between AIM and QQ

5. The writer of this passage is probably _____.

A. a Chinese who works abroad

B. an expert who works at home

C. an American who works in China

D. a salesman who sells softwares

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《饮用水水源保护区划分技术规范》属于()。

A.环境保护单行法

B.环境保护行政法规

C.环境保护部门规章

D.环境保护标准

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知觉是人脑对客观事物

A.个别属性的反映

B.整体属性的反映

C.本质属性的反映

D.特殊属性的反映

E.发展属性的反映

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产生第一心音的主要机理是

A.心房、心室肌收缩

B.二尖瓣、三尖瓣关闭

C.主动脉瓣、肺动脉瓣开放

D.二尖瓣、三尖瓣开放

E.主动脉瓣、肺动脉瓣关闭

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