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[单选题]
It’s sunny today. _______, I’m sure the plane will arrive on time.(1分)
A
While
B
Therefore
C
However
D
Otherwise
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试题答案：
B
答案解释：
解题思路：13.本题考查连词用法。根据句意“今天天气晴好，因此我肯定飞机会准时降落”， 故答案选择B项，therefore,表示因果关系。
相关题目
1.Resources can be said to be scarce in both an absolute and relative sense: the surface of the Earth is finite, imposing absolute scarcity; but the scarcity that concerns economists is the relative scarcity of resources in different uses. Materials used for one purpose cannot at the same time be used for other purposes; if the quantity of an input is limited, the increased use of it in one manufacturing process must cause it to become less available for other uses.The cost of a product in terms of money may not measure its true cost to society. The true cost of, say, the construction of a supersonic jet is the value of the schools and refrigerators that will never be built as a result. Every act of production uses up some of society’s available resources; it means the foregoing of an opportunity to produce something else. In deciding how to use resources most effectively to satisfy the wants of the community, this opportunity cost must ultimately be taken into account.In a market economy the price of a good and the quantity supplied depend on the cost of making it, and that cost, ultimately, is the cost of not making other goods. The market mechanism enforces this relationship. The cost of, say, a pair of shoes is the price of the leather, the labor, the fuel, and other elements used up in producing them. But the price of these inputs, in turn, depends on what they can produce elsewhere—if the leather can be used to produce handbags that are valued highly by consumers, the prices of leather will be bid up correspondingly.(5分)1.1 What does this passage mainly discuss?____(1分)A. The scarcity of manufactured goods.B. The value of scarce materials. C. The manufacturing of scarce goods.D. The cost of producing shoes.
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2. Although breast cancer is one of the most funded areas of cancer research, it is also one of the most confusing. It benefits from very high charitable donations, but suffers from overlapping research, over underfunding of programs, uneven disbursement (支出款项) duplicate research funded programs that do not interact or interface.Approximately one third of all monies allocated by the National Cancer Institute (NCI) for research go to breast cancer, with $631 billion dollars allocated in 2010 alone. The American Cancer Society commits close to 40 percent of its budget on breast cancer, $391 million dollars between 1992 2010, Avon Breast Cancer Crusade has donated $700 million the Susan Komen for the Cure has donated $420 million.Many other programs also provide funding, raising the annual breast cancer budget to about one billion dollars annually. Despite this huge investment, however, 59,000 women will die from breast cancer in North America alone this year.Research so far has failed to understwhat causes the five or six different types of breast cancer. They know about the BRCA 1 BRCA 2 genes, but otherwise lack information on the causes. Many breast cancer programs emphasize education. The Susan Komen Crusade, for example, allocates only five percent of its total budget on treatment, while 43 percent goes to education.If the cause of breast cancer is unknown, what is the purpose of education other than trumpeting mammograms as a means of early detection?
Translation( 20 points) Directions: Read the following passage carefully. Then translate the underlined sentences marked from 51-55 into Chinese.You should write your translation on the Answer Sheet.
10. (A)tall (B)taller (C)high (D)higher
8. (A)old (B)sick (C)good (D)nice
They're____ to build a big factory on the site.
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