单项选择题

36岁，男性。翻车肩部外伤，半小时后来院，查左锁骨中外1／3处明显畸形，局部肿胀明显，瘀血，桡动脉搏动触不到，手部发凉，皮色苍白，血压80／40mmHg。
[问题1][单选题]
该患应首先做哪项处置

A.立即拍照X线片
B.立即做化验各项检查
C.做血管造影
D.立即补液，输血
E.整复骨折，固定
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单项选择题
14岁男孩，跌跤后当晚自感全身不适，发热，左膝部疼痛，经用青霉素3日无效来院。检查左股骨下端肿胀，有局限性深压痛，膝关节内有积液，活动障碍，潮红不著，体温39.5℃，白细胞计数18×109／L，中性90％，血沉80mm／h,诊断
A.化脓性膝关节炎
B.股骨下端化脓性骨髓炎
C.创伤性膝关节炎
D.股骨下端骨肉瘤
E.风湿性膝关节炎
未分类题
Let us consider what science and technology have to contribute to the food problem.The simplest way to increase food production, one might suppose, is to bring more land【B1】cultivation and put more people to work on it. Some of the underdeveloped countries have resorted to this【B2】approach, without notable success. It contains several fallacies. For one thing, it usually means【B3】into marginal lands where the soil and climatic conditions give a poor【B4】. Cultivation may quickly deplete this soil,【B5】it for pasture or forest growth. It is often possible, of course, to turn such lands into useful farms by agricultural【B6】; for instance, a sophisticated knowledge of how to use the available water【B7】an irrigation system may reclaim semi-arid grasslands for crop-growing. But the cultivation of marginal lands is in any case unsuccessful【B8】it is carried out by farmers with a centuries-old tradition of experience or by modern experts with a detailed knowledge of the【B94】conditions and the varieties of crops that are suitable for those conditions. Such knowledge is【B10】absent in the underdeveloped countries.【B11】, we know that highly developed countries have not increased the【B12】of acres under cultivation,【B13】on the contrary have【B14】their marginal lands and steadily reduced the proportion of the population engaged in fanning. Efficient fanning【B15】concentration on the most efficient lands, and it results in greater production with【B16】peoplE.The problem of the underdeveloped countries, then is to increase the【B17】of their farms and farmers. This would allow them to industrialize and to feed their people more adequately. It is not easy to【B18】, however. The farmers are conservative and resistant to change【B19】their methods of cultivation. The underdeveloped countries are greatly in need of studies and experiments to help them to【B20】modern agricultural methods to their own conditions.【B1】A.underB.ofC.byD.in
A.B.
C.
【B1】
A.under
B.of
C.by
D.in
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