For more than two centuries, American’s colleges and universities have been the backbone of the country’s progress. They have educated the technical, managerial, (1) and provided generation after generation of national leaders. Today educators from around the globe are turning to U. S. institutions of higher learning (2) . They are apt to find many reasons for the excellence of American universities, but (3) stand out as watersheds:
Education (4) : In 1862 Congress enacted the Land-Grant College Act, which essentially extended the opportunity of higher education (5) , including such disenfranchised groups as women and minorities. Each state was permitted to sell large tracts of (6) and use the proceeds to endow at least one public college.
(7) : Over the years, the decentralization and diversity of the America’s colleges and universities have promoted competition for students and resources. Competitive pressure first arose (8) . The academy’s impact really grew after World War II, when (9) commissioned by President Roosevelt argued that it was the federal government’s responsibility to (10) for basic research. Instead of being centralized in government laboratories, scientific research (11) in American universities and generated increasing investment. It also gave graduate students research opportunities and helped (12) far and wide, to the benefit of industry, medicine and society as a whole.
(13) : The end of the World War II saw passage of the Servicemen’s Readjustment Act of 1944. The law, which provided for (14) for returning veterans, made an already democratic higher-education system accessible in ways that were (15) in Europe, opening the doors of the best universities to men and women who had (16) of going to college.
(17) : The creation of federal loan guarantees and subsidy programs, as well as outright grants for college students brought (18) to higher education and further helped to democratize access. Since its founding (19) , the Federal Family Education Loan Program has funded more than 74 million student loans worth more than (20) .

下表为珠江、淮河流域有关数据对比表。读表并回答问题。（10分）

小题1:淮河流域面积约为珠江流域的3／5，而径流总量却不足珠江的1／5，其主要原因是___________________________________。

小题2:淮河流域水资源利用率远高于珠江流域的主要原因是 ____________________________。

小题3:珠江中下游地区夏秋季节多突发性暴雨洪水，主要原因是 ____；冬季河口处常受海水入侵的威胁，主要原因是__________________。 

小题4:淮河流域7、8月份多洪水，主要气候原因是 ________________________。

小题5:珠江、淮河流域的耕地面积分别约为480万公顷和1200万公顷。若两流域单位面积耕地的农业污染量相当，根据耕地面积和径流总量的对比关系，淮河受农业污染的程度约为珠江的____倍（取整数）。

小题6:2010年广州亚运会暨第16届亚运会于2010年11月12日至27日在中国广州进行。请从地理角度谈谈该时段举办亚运会的有利条件____________________________________________________________________________

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