问题 名词解释

斜拉破坏

答案

参考答案:

过程:在破坏形态中,斜裂缝一出现就很快形成临界斜裂缝,并迅速向上延伸到梁顶得集中作用点出,将整个截面裂通,整个构件被斜拉为两部分而破坏。

特点:整个过程破坏过程急速而突然,破坏荷载比斜裂缝形成时的荷载增加不多。

原因:由于混凝土余留截面上剪应力的上升,使截面上的主拉应力超过混凝土抗拉强度

阅读理解

阅读理解。

     Time Temp Glasses

     Are you a person who wants to know the time and temperature during the day? You might like Temp

Glasses. These special glasses show the time above your right eye and the temperature your left eye. It is

surely easier than wearing a wristwatch, and you never have to guess the Tature.

     Alarm Fork

     Do you eat too quickly? Do you eat too much? How can the Alarm Fork help you? Aren't you is (好奇的)?

Well, this special fork has two lights: one green and one red. When the green is on, it's ok to eat a piece of

food. The fork "knows" when you eat a piece, and soon the red goes on. Wait for the green light before you

eat another piece.

      Smell This

      Sow do you know if your breath smells nice, or if it smells bad? It's difficult to know, because it's very

hard to smell the air that comes out of your own mouth. Smell This is useful for this ion. Smell This covers

your nose and your mouth. Docs your breath smell nice, or do you need a piece of gum (口香糖)?

      Banana Suitcase (手提箱)

      Has this ever happened to you? You put a banana in your bag lunch in the morning, and when pen the

bag at noon, the banana looks like someone drove a car over it. If you put your banana Banana Suitcase, this

will never happen. It keeps a banana safe, delicious, and looking like new!

1. The writer thinks that the four inventions are ________.

A. dangerous

B. useless

C. unusual

D. expensive

2. A person who wants to lose weight may be interested in ________.

A. Time Temp Glasses

B. Alarm Fork

C. Smell This

D. Banana Suitcase

3. Which invention is most helpful for someone waiting for a train?

A. Time Temp Glasses.

B. Alarm Fork.

C. Smell This.

D. Banana Suitcase.

4. If you want to know how your breath is. you may buy ________.

A. Time Temp Glasses

B. Alarm Fork

C. Smell This

D. Banana Suitcase

5. Who might use the Banana Suitcase?

A. A person who eats bananas only at home.

B. Someone who needs to throw away a banana.

C. A person who has little interest in eating bananas.

D. Someone who loves bananas and brings lunch to school every day.

单项选择题