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The importance of luck in the genius equation tends to be ignored.
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听力原文：M: Hi Diana, mind if I sit down？
W: Not at all, Jack. How have you been？
M: Good. But I'm surprised to see you on the city bus. Your car in the shop？
W: No. I've just been thinking a lot about the environment lately. So I decided the air will be a lot cleaner if we all use public transportation when we could.
M: I'm sure you are right. The diesel bus isn't exactly pollution free.
W: True. But they'll be running a lot cleaner soon. We were just talking about that in my environmental engineering class.
M: What's the city gonna do？ Install pollution filters of some sort on their buses？
W: They could, but those filters make the engines work harder and really cut down on fuel efficiency. In stead they found a way to make their engines more efficient.
M: How？
W: Well, there is a material called coniine oxide. It's a really good insulator. And a thick coat of it get sprayed on certain part of the engine.
M: An insulator？
W: Well, yeah. Actually, what it does is reflect back the heat of burning fuel. So the fuel will burn much hotter and burn up more completely.
M: So a lot less unburned fuel comes out to pollute the air, right？
W: Yeah, and the bus will need less fuel. So with the savings on fuel oil costs, they say this will all pay for itself in just six months.
M: Sounds like people should all go out and get some of this stuff to spray on their car engines.
W: Well, it's not really that easy. You see, normally, the materials are fine powder. To melt it so you can spray a coat of it on the engine parts, you first have to heat it over 10,000 degrees and then, well, you get the idea. It's not something you or I would be a ble to do ourselves.
(23)
The passage mainly discusses revising the definition of intelligence.
A．at the weddingB．before intermarriageC．after people get marriedD．until recently
Section B
Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice.
Kazuko Nakane's history of the early Japanese immigrants to central California's Pajaro Valley focuses on the development of farming communities there from 1890 to 1940. The Issei(first-generation immigrants)were brought into the Pajaro Valley to raise sugar beets. Like Issei laborers in American cities, Japanese men in rural areas sought employment via the "boss" system. The system comprised three elements: immigrant wage laborers; Issei boardinghouses where laborers stayed; and labor con tractors, who gathered workers for a particular job and then negotiated a contract between workers and employer. This same system was originally utilized by the Chinese laborers who had preceded the Japanese. A related institution was the "labor club , "which provided job information and negotiated employment contracts and other legal matters, such as the rental of land, for Issei who chose to belong and paid an annual fee to the cooperative for membership.
When the local sugar beet industry collapsed in 1902, the Issei began to lease land from the valley's strawberry farmers. The Japanese provided the labor and the crop was divided between laborers and landowners. The Issei began to operate farms, they began to marry and start families, forming an established Japanese American community. Unfortunately, the Issei's efforts to attain agricultural independence were hampered by govern ment restrictions, such as the Alien Land Law of 1913. But immigrants could circumvent such exclusionary laws by leasing or purchasing land in their American-born children's names.
Nakane's case study of one rural Japanese American community provides valuable information a bout the lives and experiences of the Issei. It is, however, too particularistic. This limitation derives from Nakane's methodology that of oral history which cannot substitute for a broader theoretical or comparative perspective. Furture research might well consider two issues raised by her study: were the Issei of the Pajaro Valley similar to or different from Issei in urban settings, and what variations existed between rural Japanese American communities？
The primary purpose of the passage is to ______.
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