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The total area of land on earth is about 149 million square kilometers, or about 29 percent of the total area of the earth.
The average height of the land is about 750 metres above the sea level. The Eurasian(欧亚大陆的) land mass is the largest with an area of 54,527,600 square kilometers. The smallest continent is the Australian mainland, with an area of about 7,614,600 square kilometers, which together with Tasmania, New Zealand, New Guinea and the Pacific Islands, is described as Oceania.The total area of Oceania is about 8,935,500 square kilometres, including West Iran which is political in Asia.
The world's largest peninsula(半岛) is Arabia, with an area of about 3,327,500 square kilometres. The largest island in the world is Greenland, with an area of about 2,175,600 square kilometres.
The largest island surrounded by fresh water is the Ilha de Marajo (4,022 square kilometres) in the mouth of the Amazon River, Brazil. The largest island in a lake is Manitoulin Island (2,766 square kilometres) in the Canadian section of Lake Huron. This island itself has on it a lake of 106 square kilometres called Manitou Lake, in which there are several islands.
1)、The total area of the world is about 211 million square kilometers.
A.T
B.F
2)、The area of Tasmania, New Zealand, New Guinea and the Pacific Islands adds up to about 1,320,900 square kilometres.
A.T
B.F
3)、Oceania is made up of Australia, New Guinea and the Pacific Islands.
A.T
B.F
4)、As mentioned in the passage there are several islands in Manitou Lake.
A.T
B.F
5)、The largest island surrounded by fresh water is in a river.
A.T
B.F

A.
The
B.The
C.
The
D.
The
E.
1)、The
F.
A.T
B.F
2)、The
G.
A.T
B.F
3)、Oceania
H.
A.T
B.F
4)、As
I.
A.T
B.F
5)、The
J.
A.T
B.F

【参考答案】

B;A;B;A;A
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听力原文:W: Hi, Tom. How is your chemistry paper going?M: It's coming along. But I've been staring at this computer screen for hours and my eyes hurt.W: Yeah. Doing that can make your eyes really dry and tired. You should take a break.M: I can't. I have to get this paper written. It's due tomorrow.W: You know I read about computers and eye problems recently. The article says that they are usually caused by not blinking your eyes enough.M: Blinking? I thought I just needed new glasses.W: No. When you blink, the movement of closing and opening your eyes, even though it happens really fast, helps moisten your eyes. It's the lack of moisture that causes the problem.M: That makes sense. But what does it have to do with the computer?W: People who use computers tend to stare at the monitor and blink less often than they normally would. That leads to dry irritated eyes.M: Well, that's certainly how mine feel now. They really hurt.W: The article I read about the office workers found that the workers averaged twenty-two blinks a minute when relaxed, but just seven a minute while looking at the text on a computer screen.M: Wow. That's quite a difference.W: They also kept their eyes open wider which means the moisture evaporate more quickly.M: I wonder if using some kind of eye-drops will make them feel better.W: That might help. But the best prescription is to just take a break and rest your eyes.M: OK. I think I really need a rest. I can finish this later tonight.W: Let's go get some coffee for a break.M: Good idea! Since you give me such useful information, it's my treat.W: You are so nice.M: Oh, it's my pleasure to have a drink with such a lovely girl!(23)A.The disadvantages of working in an office.B.How using a computer can affect one's eyes.C.Why Tom needs to get glasses.D.Research Tom has done for his chemistry paper.