题目内容
All those______ to see the exhibition, get off the bus at the next stop.
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According to the passage, what does the average negotiators usually do？
Which of the following statements is TRUE？
The customer bought the hat by ______.
The exploitation of the power in the Sun's rays is a form. of alternative energy now showing new commercial promise.
In the US, manufacturers have made important 【C1】______ in the development of the technology to bring down the cost of solar conversion systems 【C2】______ improving their reliability.
The direct conversion of solar 【C3】______ electrical energy, using photovoltaic cells 【C4】______ distinct advantages as an alternative energy option.
【C5】______ other forms of renewable energy, photovoltaic is based on modular solid state devices which can be mass 【C6】______ at a relatively low cost.
Here wafers of silicon—not dissimilar 【C7】______ ones which are turned into silicon chips— 【C8】______ an electric current when light falls upon them.
When built into panels or modules where each cell interconnects, the amount of electricity generated can be large enough to 【C9】______ a home or even a community.
Over the past 10 years, 【C10】______ extensive research and substantial Government and private industry funding, the price of photovoltaic modules has dropped 【C11】______ .
【C12】______ in 1973-74 the price per peak watt was between US $100 and $150, commercial prices for small array system now vary between $6.50 and $7 per watt.
This rapid price reduction has been accompanied by a 400 per cent jump in the 【C13】______ efficiency of photovoltaic modules.
【C14】______ solar cells are poor converters of sunlight to electricity. Early cells could only manage to mm about five per cent of the incident rays into electricity, but recent development have increased 【C15】______ to more than 10 percent.
【C1】
听力原文：M: Can I help you, Madam？
W: How much is this hat？
M: 1,000 pounds, Madam.
W: That's so expensive. What's it made of？
M: It's made of real fur. Those hats are cheaper. This one here costs only 500 pounds. Who is it for？
W: It's for my mother-in-law as her birthday gift.
M: Probably too small for your mother-in-law. How about this one？ It's bigger.
W: What size is it？
M: It's size sixty.
W: Yes, it's big enough. It's the right size for my mother-in-law. What's it made of？
M: It's made of wool. And the price is 750 pounds.
W: What do you think of it？
M: Well, it looks perfect on you, Madam. But will your mother-in-law like it？
W: Perhaps not. It's the fight size and it's not too expensive. But my mother-in-law prefers very deep colors.
M: Ah! That far hat is dark brown, Madam, and it's the right size. What do you think of it？
W: It's quite nice. I'll take it. How much does it cost？
M: 800 pounds. You may pay it by cash, check or credit card？
W: Hero is my credit card.
Who is the hat for？
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