合格境外机构投资者应当（）。 A.委托境内商业银行作为托管人托管资产 B.委托境外商

The London Olympic Games are coming soon. This summer, Chinese sports fans will be able to watch the exciting games in 3-D on CCTV.

When you watch 3-D movies or TV, you have to wear a special pair of glasses. The 3-D glasses make the people and the things on the screen look like they are in the room with you.

3-D, means having three *dimensions: *width, height and *depth. 3-D technology is based on the way the human brain and eye work. Because the *pupils of a person’s eyes are about 6.5cm apart, when we look at something, each eye sees it from different *angle. Our eyes send the two pictures to our brain, and the brain puts them together. The small difference between the picture from the right eye and the picture from the left eye make us see depth.

While watching 2-D films, we don’t have to wear the special glasses. We see the pictures in two dimensions, each eye get the same information. This is because there is only one way of watching it.

So the aim of 3-D technology is to get a different picture into each eye of the person. It uses two film *projectors. One *projects a left eye picture and the other projects a right eye picture. When we are in the cinema, we can see different pictures in each eye at the same time with the help of the 3-D glasses.

While watching 3-D films, we feel that we are actually in the same environment as the things we are watching. However, some people are against watching 3-D films. One of the reasons is the 3-D glasses makes the screen of the film or TV look darker. It is bad for eyes. What’s more, people with eye problems may get headaches if they spend too much time watching 3-D movies, because their brains need to work harder to “read” the pictures.  

小题1:Paragraph 3 mainly tells us __________.

A．how we see things in 3-D

B．how we watch the Olympic Games

C．how 3-D films are made

D．where we watch 3-D films or TV小题2:When we watch a 2-D film, each of our eyes get ________ information.

A．no

B．different

C．dark

D．the same小题3:Which is the following is right according to the passage?

A．We don’t have to wear 3-D glasses if we watch games in 3-D on TV.

B．The 3-D technology is based on the way the human ear and eye work.

C．All the people can have fun watching 3-D movies or TV for a long time.

D．3-D glasses make us see different pictures in each eye at the same time.小题4:Why are some people against watching 3-D films? Because ____________.

A．they make them more excited or sadder

B．3-D glasses make the screen look darker

C．3-D films make all people get headaches

D．they dislike watching the Olympic Games

白色恶露的持续时间（）

A.1周

B.2周

C.3周

D.4周

E.6周

人体脊椎中，活动度最大的部分是（）。

A.颈椎

B.胸椎

C.腰椎

D.骶椎

E.尾椎

空调空冷式冷凝器是以强制流动的（）作为冷却介质，在其通过冷凝管外表面时，吸收管内制冷剂的热量，并把它散发到周围环境中。

A.冷却水

B.制冷剂

C.空气

D.氟里昂

一般地，夹具上夹紧机构的作用是（）。

A.将工件压紧、夹牢在定位元件上

B.起定位作用

C.把夹具紧固在机床上

D.使工件在外力作用下发生了位移