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癌症是多发病，约（）%晚期癌症患者都有剧烈疼痛。

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下列程序运行后的输出结果是 ______。 #include＜iostream.h＞ void main() •{ int s=0，k for(k=7；k＞=0；k--) { switch(k) { case 1： case 4： case 7：s+ +；break： case 2： case 3： case 6：break； case 0： case 5：s+=2；break； } } cout＜＜"s="＜＜s＜＜endl； }

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Imports from Asian countries are more competitive than U.S. home-made products because of lower wages in Asia and the exemption of duties for imported goods shipped to the United States.

A. True
B. False

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What was the major change in agriculture during the 19th century

A. Crop production became increasingly specialized.
B. Economic depressions lowered the prices of farm produce.
C. New banking laws made it easy to buy farmland.
D. The United States increased its agricultural imports.

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Compared with this year, the estimated world oil growth for 2005 will__________.

A. be 84 million more barrels per day
B. increase by 2.5%
C. be up 2.53 million barrels per day
D. be up 1.8 million barrels per day

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