08-32捣固车液压减振器工作（）年后，要在专用试验台上进行性能实验。A、二 B、四

根据17×3=51，直接写出170×3=______，1700×3=______．

[1] Look at the center circles of Diagram A and Diagram B. Which of the centre circles looks larger?

[2] Take a first look and you probably think that the centre circle in Diagram A is smaller than that in Diagram B. In fact, they are exactly the same size.

[3]Then look at the picture on the right.What do you see? A vase? Or two faces? Does the picture change quickly from one to the other again and again? Maybe or maybe not, but you can see them at the same time.

[4]“What’s happening? Is something wrong with my eyes?” You may wonder at what you see. Don’t worry. Here is how it goes:

[5]When we look at things, our eyes send messages to our brains and then our brains interpret (解释) the information. However, sometimes our brains interpret the received information in a wrong way. It seems that our eyes are playing a joke on us. This often happens and we call it “Visual illusion(幻觉)”.

[6] Movie makers often make use of illusions. They make the objects around actors much smaller or bigger than usual. This makes us believe that the actors are much larger or smaller than they usually are. The movies Jurassic Park and Honey J shrunk the kids just make use of illusions.

66. In which column of a magazine can you read the above text?

A. Culture.          B. Science.     C. Humour.    D. Education.

67. The centre circle in Diagram A looks smaller than that in Diagram B, That’s because____.

A. something is wrong with our eyes

B. the two circles are not of the same size

C. our brains interpret the information wrongly

D. pictures change quickly from one to the other

68. In the picture on the right, it seems that Line AB is shorter than lane

CD, but in fact lane AB is as long as Line CD. Which paragraph

can explain what has happened to our eyes?

A. The second one.             B. The third one.

C. The fifth one.                    D. The sixth one.

69. What’s the right order according to the text?

a. We look at things with our eyes.      

b. Our brains interpret the messages.

c. Our brains tell us what we have seen.  

d. Our eyes send messages to our brains.

A. a-d-b-c     B c-a-b-d       C a-c-d-b       D. b-e-a-d

70. Movie makers make use of visual illusions to        .

A. help the actors look better             B. make the actors much braver

C. help the actors become stronger      D. make the actors seem different in size

ARP协议属于（）协议，它的作用是（）。

ARP协议属于（）协议

A．物理层

B．数据链路层

C．网络层

D．传输层

2-苯基乙醇