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问题 单项选择题

男，23岁，车祸后3小时入院。体检：右大腿中段明显肿胀，明显移位畸形，皮温高于对侧，体温39℃，白细胞正常，最可能的诊断

A．右大腿软组织化脓性感染

B．右大腿血肿

C．右股骨干骨折

D．右大腿软组织挫伤

E．右股骨骨髓炎

答案

参考答案：C

单项选择题

Why is (71) fun What delights may its practitioner expect as his reward First is the sheer joy of making things. As the child delights in his mud pie, so the adult enjoys building things, especially things of his own design. Second is the pleasure of making things that are useful to other people. Third is the fascination of fashioning complex puzzle-like objects of interlocking moving parts and watching them work in subtle cycles, playing out the consequences of principles built in from the beginning. Fourth is the joy of always learning, which springs from the (72) nature of the task. In one way or another the problem is ever new, and its solver learns something: sometimes (73) , sometimes theoretical, and sometimes both. Finally, there is the delight of working in such a tractable medium. The (74) , like the poet, works only slightly removed from pure thought-stuff. Few media of creation are so flexible, so easy to polish and rework, so readily capable of realizing grand conceptual structures.
Yet the program (75) , unlike the poet’s words, is real in the sense that it moves and works, producing visible outputs separate from the construct itself. It prints results, draws pictures, produces sounds, moves arms. Programming then is fun because it gratifies creative longings built deep within us and delights sensibilities we have in common with all men.

A．programming

B．composing

C．working

D．writing
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选择题

解释下列事实的方程式不正确的是（　　）

A．用碳酸钠溶液处理水垢中的硫酸钙：Ca2++CO32-=CaCO3↓

B．硫酸型酸雨放置一段时间溶液的pH下降：2H2SO3+O2=2H2SO4

C．向硅酸钠溶液中滴入稀盐酸得到胶体：Na2SiO3+2HCl=H2SiO3（胶体）+2NaCl

D．用石墨电极电解AlCl3溶液阴极附近生成沉淀：2Al3++6H2O+6e-=2Al（OH）3↓+3H2↑
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