常见铰链的种类有:普通双销子台面铰链、隐蔽式铰链、自关铰链、双面反向铰链、全榫式铰链

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问题:

常见铰链的种类有:普通双销子台面铰链、隐蔽式铰链、自关铰链、双面反向铰链、全榫式铰链、单门用摆动式铰链等。在使用单门用摆动式铰链时,它的最大开启角度为( )。

A.90°

B.180°

C.250°

D.270°

考点:木工精细木工中级精细木工中级
题型:单项选择题

阅读理解。

     Most people enjoy hiking. Hiking is not only a healthy but also a relaxing activity. The reason why people

go hiking is different. There are some of the most popular reasons for people to hike.

     First of all, hiking is a very good exercise which will improve your body. It's a good exercise that doesn't

hurt your body.

     Secondly, hiking is simple and cheap. All you need to do is to wear a pair of hiking boots and your smile

to start.

     Finally, hiking is the best way to get away from your everyday life.

     You could hike alone with your friends. After hiking, you will have a clear mind and then return to work

with confidence (自信). So why not plan your hiking route right away?

1. All people go hiking for _____.

A. no reasons

B. different reasons

C. the same reasons

2. What do we have to do when hiking?

A. Wear special shoes.

B. Carry much money.

C. Go alone.

3. After hiking we can _____.

A. feel very tired

B. grow very fast

C. feel better

4. There are _____ most popular reasons for people to hike in the passage.

A. 3

B. 4

C. 5

5. According to the passage, which of the following is Right?

A. Hiking is good for body, not for mind.

B. Hiking is good for mind, not for body.

C. Hiking is good both for body and mind.

题型:单项选择题

引起乳糜尿的最常见原因是()。

A.慢性丝虫病

B.肾病综合征

C.肾小管慢性疾病

D.腹膜结核

E.慢性肾炎

题型:单项选择题

信息处理手段的第一次飞跃应当说是()。

A.结绳记事

B.筹码计算

C.文字的产生与使用

D.手语

题型:单项选择题

何谓橡胶的混炼?用开炼机和密炼机分别进行混炼时应控制的工艺条件有哪些?

题型:单项选择题

优先股股息在当年未能足额分派时,能在以后年度补发的优先股,称为()

A.参与优先股

B.累积优先股

C.可赎回优先股

D.股息率可调整优先股

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