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如果一次函数y=kx+b的图像经过点A(1，7)和8(0，2)，则k=（） (A)-5 (B)1 (C)2 (D)5

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完成下列各题 C New Zealand’s main exports come from the nation’s farms--wool，meat，butter，cheese，and skins．Many people process farm products in dairies(牛奶房)，meat-refrigerating plants，breweries(啤酒厂)and flour mills．Sawmilling is an important industry where logging is carried on in the forests to make pulp for newsprint and other mills make various kinds of paper． Most of New Zealand’s heavy machinery must be imported，but assembly(装配)plants make automobiles and trucks from imported parts．Woolen goods，carpets，clothing，shoes，furniture and electrical appliances are also manufactured．Imported petroleum(石油)is refined(精炼)at an oil refinery at Whangarei．An aluminum smelter at Blutt，near Invercargill，use hydro—electricity to refine one that is imported from Australia． New Zealand’s coal is used to generate steam，make gases，provide fuel for homes and factories and produce electricity．Sand and gravel(砂砾)used for road building and concrete (混凝土)construction，ranks second to coal．Limestone is used to make fertilizer and ce—ment． In the first paragraph，“sawmilling”refers to________．

A. wood—processing industry
B. shoe—making industry
C. news—print industry
D. mineral refining industry

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已知函数f(x)=㏒2(ax+b)，若f(2)=2,f(3)=3，则（） (A)a=1，b=-4 (B)a=2，b=-2 (C)a=4，b=3 (D)a=4，b=-4

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全运会男子l0000米比赛，大连、北京、河南各派了三名运动员参加。赛前四名体育爱好者在一起预测比赛结果。甲断言：“传统强队大连队训练很实，这次比赛前三名非他们莫属。”乙则说：“据我估计，后起之秀北京队或者河南队能够进前三名。”丙预测：“第一名如果不是大连队的，就是北京队的。”丁坚持：“今年与去年大不相同了，前三名大连队最多能占一席。”比赛结束后，发现四人中只有一人的预测是正确的。以下哪项最可能是该项比赛的结果()

A. 第一名大连队，第二名大连队，第三名大连队。
B. 第一名大连队，第二名河南队，第三名北京队。
C. 第一名北京队，第二名大连队，第三名河南队。
D. 第一名河南队，第二名大连队，第三名大连队。
E. 第一名河南队，第二名大连队，第三名北京队。

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The passage suggests that which of the following is most likely to be true of United States trade laws？

A. They will eliminate the practice of “dumping” products in the United States.
B. They will enable manufacturers in the United States to compete more profitably outside the United States.
C. They will affect United States trade with Canada more negatively than trade with other nations.
D. Those that help one unit within a parent company will not necessarily help other units in the company.
E. Those that are applied to international companies will accomplish their intended result.

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