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问题 单项选择题 共用题干题

30岁工人，操作机器时不慎被机器将右前臂卷入而受伤。当地医院处理后，因局部疼痛不断加重，30小时后转上级医院治疗。就诊时诉前臂疼痛，不能活动，手指有麻木感、无力。检查：右前臂皮肤完整无破损，广泛皮下瘀斑，肿胀较甚，多处张力性水泡，广泛压痛，前臂外下方及内上方可及明显骨擦音，异常活动明显，肘、腕关节被动活动正常。桡尺动脉搏动较对侧略弱，手指活动尚可，感觉欠灵敏。

经处理后，患者诉患肢疼痛未减轻，手指麻痹感加重，检查发现患肢肿胀加重，手指发凉，桡尺动脉搏动明显减弱，被动牵拉手指患肢疼痛加剧。可能发生了（）。

A.肌间隔综合征

B.肢体动脉供血障碍

C.肢体静脉回流障碍

D.严重感染

E.继发性神经损伤

答案

参考答案：A

单项选择题

硅酸盐水泥熟料矿物中只对后期强度贡献大的是（）

A、C3A

B、C4AF

C、C3S

D、C2S
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填空题

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) .
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