题目内容
（请给出正确答案）
Why light in color is important to large animals in deserts？
A．It helped them maintain a constant normal body temperature.
B．It reflects rather than absorbs the sun-light.
C．It helps them see their peers at night.
D．It keeps them keep cool during the night.
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更多“Why light in color is important to large animals in deserts？A．It helped them maintain a co”相关的问题
What is color？ Why do some objects look red, others green, others blue？
Color is caused by reflected light rays. We see color because objects reflect light. Some thing that is red reflects mostly red light. In the same way, a green object reflects mostly green light. White objects reflect all colors of light. Black objects do not reflect any light.
What happens to the colors of light that are not reflected？ They are absorbed by the object. The darker the color, the less light is reflected and the more light is absorbed. Light that is absorbed is turned into heat. For this reason, dark-colored clothes are warmer in the sunlight than light-colored clothes.
Which is the main idea of this passage？
A．Dark-colored clothes are warmer in the sunlight.
B．Objects absorb part of the sunlight.
C．Color is caused by reflected light rays.
D．A red object reflects mostly red light.
听力原文：W: What can I do for you, sir？
M: I'd like to look at some T-shirts. Light color, medium size.
Q: Where does the conversation most probably take place？
(2)
A．In a shop.
B．In a restaurant.
C．In a theater.
D．In a hotel.
Why roses are red and violets are blue？
Did you ever wonder why you see the colors you do or if other animals see the same colors that you see？ We see light that bounces off of things around us. When the light enters our eyes, special cells tell our brains about the light. These cells are called photoreceptors. Light is made of little bits called photons. When the sun shines, trillions and trillions of these little bits of light fall on the earth. The photons bounce off of almost everything and some of them enter our eyes. Those bits that enter our eyes allow us to see. So, where does the color come from？
Starting in the 1600s with Sir Isaac Newton, scientists have believed that there are different kinds of photons. Different types give rise to our sense of colors. The different photons are said to have different wavelengths. Sunlight contains all the different wavelengths of photons. The visible wavelength colors can be seen when you look at a rainbow. Raindrops acting as natural prisms produce the colors.
HOW do our photoreceptors work？
We have two main types of photoreceptors called rods and cones. They are called rods and cones because of their shapes. These cells are located in a layer at the back of the eye called the retina. Rods are used to see in very dim light and only show the world to us in black and white. This is why you see only black and white when you are outside in the evening or in a dimly lit room. The other type of photoreceptors, the cones, allow us to see colors. They are not as sensitive as the rods so they only work in bright light. There are three types of cones, one for each of the three main colors we see, red, green and blue.
Some people have a genetic defect that makes one or more of the cones fail. This condition is known as color deficiency. You may have heard it called color blindness. Color blindness is fairly common, affecting about nine percent of all humans.' It is much more common in men than in women. To test for color blindness a special picture called an Ishihara test is used.
What about other animals？ What kind of colors do they see？ Most animals see fewer colors than we do, but some see more! We know this by looking at how many kinds of cone
photoreceptors they have. Another good indication of what an animal can see is by looking at their own colors. The colors of their prey are also an indication of an animals ability to see color.
What three primary colors do we see？
A．Red, white, and blue.
B．Red, green, and yellow.
C．Red, green, violet.
D．Red, green, blue.
W：Well，for the moment I like light pink for the bed- room，light blue for the sitting room and yellow for the kitchen；
Q：What does the man do？
(16)
A．House painter.
B．Salesman.
C．Mailman.
D．Milkman.
听力原文：M: Your yellow and white skirt looks nice!
W: Thanks．But I prefer light blue.
Q: What color does the woman like？
(23)
A．Yellow.
B．White.
C．Light blue.
听力原文： When I was in British Columbia last July working at the department's archaeological dig, I saw the weirdest rainbow. At first I couldn't believe my eyes because the bands of color I saw weren't in a single half circle across the sky. Instead, I saw a full circle of rainbow hues hanging in the sky just above the sea. Inside the circle there was a big white disc and above the circle there was another round band of colors forming a halo. There were curved legs of multicolored light coming off the sides of the circles. It was an incredible sight.
I ran back to our main camp and tried to get our cook to come with me to see my fantastic find before it disappeared. He just laughed at my exciting story and told me that what I saw was nothing special.., just some "sun dogs". He said I'd be sure to see many more before I left. And sure enough, I did. When I got back from the dig I asked Professor Clark about the "sun dogs," and she's going to tell us more about them.
26. Why was the student in British Columbia？
27.What did the student find so unusual about the "rainbow" he saw？
28.What was inside the large circle？
29.What did the cook say about the phenomenon the student had seen？
30.What did the cook call the phenomenon？
(31)
A．To study its geography.
B．To help at an archaeological dig.
C．To take a vacation with friends.
D．To do research for a physics project.
Section B
Directions: This section is to test your ability to understand short conversations. There are 2 recorded conversations in it. After each conversation, there are some recorded questions. The conversations and the questions will be spoken only once. When you hear a question, you should choose the correct answer from the 4 choices marked A, B, C, and D.
听力原文：W: Good morning, sir. Are you being attended to？
M: I'm looking for 5×6 cushions. Do you have one of this size？
W: Yes, we do. But what color do you want？
M: Dark and light yellow woven together.
W: Please move over here, sir. How about this one？
M: Mm...I like the color and the pattern. But do you have another one so that I can choose？
W: I'm sorry, we don't. If you really want to buy, we can give you 6% off. since this is the last blue one left. It's a real bargain.
M: But I must make sure that there isn't anything wrong with cushions first.
W: Fine, go ahead, please.(A few minutes later.)
M: Are you sure I can get 6% discount？
W: Absolutely sure.
M: Then I'll take it. As far as the size, color and the pattern are concerned, and they are just what I appreciate. By the way, can you have it shipped to me in Denmark？
W: Certainly, sir. Leave your name and address with us, please.
M: All right. Thanks a lot.
W: You are very welcome.
Q6: What color of the carpet does the customer want to buy？
(6)
A．Dark and light blue.
B．Dark and light green.
C．Dark and light brown.
D．Dark and light yellow.
听力原文：W: At first I thought this dress was blue, but now it looks green to me.
M: You were right the first time. It's this yellow light in the store that makes everything look different.
Q: According to the man what is the color of the dress？
(13)
A．Red.
B．Blue.
C．Yellow.
D．Green.
听力原文：W What are you doing sitting in the dark？ Why don't you turn on the light？
M I had it on, but it just turned off a few minutes ago. I figured the electricity had gone out in the building. W No, these lights go off in half an hour if they detect no movement in the room. To turn them back on, all you have to do is wave your arms.
M You're kidding! I didn't even budge when the lights went out. I suppose if I had gotten up, I would have figured out what was going on.
Why is the woman surprised？
A．The office is unlocked.
B．The office is very cold.
C．The man is sitting in the dark.
D．The man is leaving the office early.
听力原文：M: Are you going to replace the light switch by yourself？
W: Why should I call an electrician？
Q: What does the woman imply？
(15)
A．She can do the job.
B．She's just switched off the light.
C．She's already replaced the switch.
D．She will call an electrician.
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