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There was a heavy fog this morning, so no plane could ______ on time.A.get throughB.take o

There was a heavy fog this morning, so no plane could ______ on time.

A.get through

B.take off

C.put on

D.break out

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第1题
Dear Mr. Shumar,We appreciate you for your inquiry of January 28 and send our quotation fo

Dear Mr. Shumar,

We appreciate you for your inquiry of January 28 and send our quotation for laser printers.

We have the widest (141) of printers in town. Their state-of-the-art technology, attractive designs, and the reasonable prices at which we offer them (142) you that they are worth the price. There is a heavy demand for them from individual customers in other parts of the province, which we find it difficult to meet, but (143) we receive your order within the next ten days, we will give you a firm offer for delivery by the middle of February at the prices quoted. On orders for fifty units or more we allow a special discount of 10% for full payment within 3 weeks from the date of invoice.

For questions regarding the 2 year warranty program, please contact me at (800) 742-5656 or www, quicklaser. com. I look forward to receiving your order.

Sincerely,

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(41)

A.area

B.selection

C.condition

D.application

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第2题
听力原文:Listen as a guide describes the ancient art of thatching a roof.Welcome to the Fo

听力原文: Listen as a guide describes the ancient art of thatching a roof.

Welcome to the Four Winds Historical Farm, where traditions of the past are preserved for visitors like you. Today, our master thatchers will begin giving this barn behind me a sturdy thatched roof able to withstand heavy winds and last up to a hundred years. How do they do it? Well, in a nutshell, thatching involves covering the beams or rafters--the wooden skeleton of a roof--with reeds or straw. Our thatchers here have harvested their own natural materials for the job--the bundles of water reeds you see lying over there beside the barn.

Thatching is certainly uncommon in the United States today. I guess that's why so many of you have come to see this demonstration. But it wasn't always that way. In the seventeenth century, the colonists here thatched their roofs with reeds and straw, just as they had done in England. After a while, though, they began to replace the thatch with wooden shingles because wood was so plentiful. And eventually, other roofing materials like stone, slate, and clay tiles came into use.

It's a real shame that most people today don't realize how strong and long-lasting a thatched roof is. In Ireland, where thatching is still practiced, the roofs can survive winds of up to one hundred ten miles per hour. That's because straw and reeds are so flexible. They bend but don't break in the wind like other materials can. Another advantage is that the roofs keep the house cool in the summer and warm in the winter. And then, of course, there's the roofs' longevity—the average is sixty years, but they can last up to a hundred. With all these reasons to start thatching roofs again, wouldn't it be wonderful to see this disappearing craft return to popularity?

26. What is about to be demonstrated?

27.What are thatched roofs made of?

28.According to the speaker, why did thatching die out in the United States?

29.According to the speaker, why does thatch survive strong winds?

30.According to the speaker, how might thatching become popular again?

(26)

A.Putting a roof on a barn.

B.Harvesting water reeds.

C.Using stone as a building material.

D.Daily farm operations.

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第3题
一维非稳态导热采用向前差分离散微分方程,其显式格式的中心节点方程的稳定性条件为()。

A.Fo≤1/2

B.Fo<1/2

C.Fo≥1/2

D.Fo>1/2

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第4题
对于非稳态导热问题,在什么情况下可以首选数值计算方法进行计算?()

A.Bi<0.1

B.Bi>0.1且Fo>0.2

C.Bi>0.1且0.0625<Fo<0.2

D.Bi>0.1且Fo<=0.0625

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第5题
无限大平板非稳态导热时什么条件下取无穷级数的首项计算温度已足够精确()。

A.Fo>0.2时

B.Bi=0时

C.Bi>0.1时

D.Fo<0.2时

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第6题
建立内节点方程时,显式差分格式的稳定性判据的条件是()?

A.Fo<=1/4

B.Fo>=1/4

C.Bi<=1/4

D.Bi>=1/4

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第7题
Strategic alliances are cooperative agreements between potential or actual_________ fo

A.coordinators

B.partners

C.enterprises

D.competitors

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第8题
Diagram primary cell that have the fo llowing net reactions.

Diagram primary cell that have the fo llowing net

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第9题
Currency swap is___________ purchase and sale of a given amount of foreign exchange fo

A.continuous

B.exact

C.simultaneous

D.opposite

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第10题
对于受预紧力和轴向变载荷的紧螺栓连接,当轴向工作拉力在0到F之间变化时,螺栓受到的总拉力在()之间变化。(F'为预紧力,F"剩余预紧力,FO为最大总拉力)

A.F到FO

B.F'到FO

C.F"到F'

D.0到F'

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第11题
7巴泄压自保阀KV1101是FO阀。()
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