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问题 填空题

下列物质①熟石灰②稀盐酸③石墨④活性炭⑤纯碱⑥氢氧化铝，在生产生活中有广泛用途，请按以下要求填空．（填序号）

（1）可以用来吸附有毒气体的是______；（2）可除去水壶中水垢的是______：

（3）治疗胃酸过多的药物胃舒平中，含有的成分是______；

（4）用作干电池电极的是______．

答案

（1）活性炭具有吸附作用，可以用来吸附有毒气体．故填：④．

（2）水垢的主要成分是碳酸钙，能和稀盐酸反应生成氯化钙、水和二氧化碳，从而除去水垢．故填：②．

（3）胃酸显酸性，能和氢氧化铝反应．故填：⑥．

（4）石墨具有良好的导电性，可以用作干电池的电极．故填：③．

选择题

老王（男）在医院体检的结果如下：红细胞460万个/微升；白细胞24000个/微升；血小板18万个/微升；血压16/13.5千帕．老王被诊断为（　　）

A．贫血和高血压

B．急性炎症和高血压

C．盆血和低血压

D．急性炎症和低血压
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单项选择题

The idea that some groups of people may be more intelligent than others is one of those hypotheses that dare not speak its name. But Gregory Cochran is (1) to say it anyway. He is that (2) bird, a scientist who works independently (3) any institution. He helped popularize the idea that some diseases not (4) thought to have a bacterial cause were actually infections, which aroused much controversy when it was first suggested.

(5) he, however, might tremble at the (6) of what he is about to do. Together with another two scientists, he is publishing a paper which not only (7) that one group of humanity is more intelligent than the others, but explains the process that has brought this about. The group in (8) are a particular people originated from central Europe. The process is natural selection.

This group generally do well in IQ test, (9) 12-15 points above the (10) value of 100, and have contributed (11) to the intellectual and cultural life of the West, as the (12) of their elites, including several world-renowned scientists, (13) . They also suffer more often than most people from a number of nasty genetic diseases, such as breast cancer. These facts, (14) , have previously been thought unrelated. The former has been (15) to social effects, such as a p tradition of (16) education. The latter was seen as a (an) (17) of genetic isolation. Dr. Cochran suggests that the intelligence and diseases are intimately (18) . His argument is that the unusual history of these people has (19) them to unique evolutionary pressures that have resulted in this (20) state of affairs.

17（）

A.development

B.origin

C.consequence

D.instrument
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