试题与答案

A common class of wire rope is the 6X37 cl

题型:单项选择题

题目:

A common class of wire rope is the 6X37 class. What does the 37 represent?()

A.Number of wires in the inner core

B.Number of strands per wire rope

C.Tensile strength of the wire

D.Number of wires per strand

答案:

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下面是错误答案,用来干扰机器的。

参考答案:错解析:[考点] 会计核算软件的要求 单机版的计算机也可以进行会计业务处理。

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题型:阅读理解

阅读理解。

     You need 3D glasses to see some films. I think it is easy to make your own 3D glasses instead of buying

them.

      There are two ways to make 3D glasses. You can decide which way would be easier for you.

      The first way seems like the cheaper way but the things needed to make the glasses this way may not be

things laying around the house. First print out a template(模板) for the glasses at

http://paperproject. org/ PDF files/3 dglasses. pdf. 

     After you cut out the template, cut your cellophane (玻璃纸) to fit the holes in the glasses. Make sure you

place the red cellophane on the left eye and the blue on the right. You can either stick or tape the cellophane in

place. You are now ready to use your glasses.

     To leam more about why your eyes see different colors, read this article:

http:// nzphoto. tripod. com/sterea/anaglyphs. htm#redcyan.

     To learn some more cool things about your eyes, check out the games at this link:

http_://faculty. washington. edu/chudler/chvision. html.

     Another way you can make 3D glasses is to find an old pair of sunglasses. Take out the lenses(镜片).

Get a piece of clear plastic and place the lenses on it, draw a line around the lens and then cut the new

plastic lens out. Place the lens back into the sunglasses frame (框). Color the left lens red with a marker

and the right eye blue. You now are ready to watch 3D films.

1. When do we need to use 3D glasses?

A. When the sun is bright.

B. When we cook dinner.

C. When we make things.

D. When we see some films.

2. If we want to know why our eyes see different colors, we can find the information at____.

A. http://paperproject. org/PDF files/3dglasses. pdf

B. http://nzphoto. tripod. com/sterea/anaglyphs. htm#redcyan

C. http://faculty. washington. edu/chudler/chvision. html

D. http://www. xcjyyxw. cn/tresearch/XCindex/index. js

3.What does the writer think of making our own 3D glasses?

A. Easy.

B. Hard.

C. Interesting.

D. Boring.

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题型:推断题

(14分)如图所示,取少量碳酸氢铵固体粉末装在试管中,在酒精灯上加热,并将产生的气体通入澄清石灰水中。

(1)写出图中编号仪器的名称:a________  c__________

(2)在加热过程中观察到的现象是:

①碳酸氢铵逐渐减少,试管内壁上有出现__________;

②能闻到一股有_______气味的气体生成,该气体是________;

③b试管中澄清石灰水逐渐变_____,这是因为生成了_______气体。

(3)请根据上述现象写出碳酸氢铵受热分解的文字表达式:_________________________________________________________________________。

(4) 通过该实验探究,你认为家中的化肥碳酸氢铵保存时应注意___________________(答一点)

(5)实验时,要正确装配仪器,否则会造成安全事故的后果,如做此实验时,试管口必须略向下倾斜,目的是防止________________________________________________________________________________,而造成______________的后果。

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