分析 人类生长激素是人体产生的一种天然激素,它能够促进孩子骨骼和肌肉的发育,科学家允许用它制作药物,且在很多国家中注射生长激素都是合法的.
然而,现在有些运动员开始注射这种药物.生长激素能够促进成年人的生长发育,且科学家证实注射这种激素能够使运动员在短途快跑中提高5%的成绩.许多运动员声称该激素使他们更强壮,且使他们更快的从伤痛中恢复.
由于这种激素不容易检测,因此很多运动员对他很痴迷.科学家发明了一种检测方法,即使是注射两周后也可以检测出来.但是这并不容易,因为每个人的身体中都有生长激素.
科学家提醒运动员,注射生长激素可能会导致头疼,更严重的是能够导致心脏肥大,高剂量的生长激素增加癌症风险.但是这些后果并不能阻止运动员们使用这种激素,因此他们想的只有赢,随后才会考虑自己的健康.
解答 51.D.推理判断题.根据It is a natural substance(物质) produced by the human body,and it helps children's bones and muscles(肌肉) to grow.可知,生长激素是人体产生的一种天然物质,能够促进儿童骨骼和肌肉的发育,因此A、B正确;根据HGH is considered a wonder drug for children.It helps many children with growth problems every year.可知,生长激素对于儿童来说是一种神奇的药物,它帮助许多儿童克服生长上的问题,因此C正确;D选项文章中并没有提及;
52.A.段落主旨题.根据第二段的内容,主要讲的是然而,现在有些运动员开始注射这种药物.生长激素能够促进成年人的生长发育,且科学家证实注射这种激素能够使运动员在短途快跑中提高5%的成绩.许多运动员声称该激素使他们更强壮,且使他们更快的从伤痛中恢复.因此A.some athletes believe HGH can help them do better.是正确的,即有些运动员认为生长激素确实对他们有好处.
53.B.细节理解题.根据Testing is usually done only during competitions,but athletes use HGH during training,so it is very difficult to know who has used the drug.This makes it very attractive for some athletes.可知,检测运动员有无注射激素通常是在比赛的时候才会进行,但是运动员在训练的时候注射生长激素,在比赛的时候很难检测到,因此很多运动员对这种激素很着迷,原因就是很难检测出来.
54.C.词义猜测题.根据HGH helps add muscle in adults and recent research by the World Anti-Doping Agency shows that HGH may improve the sportsman's time by 5% when he takes part in short,fast races.可知,在一些短途快跑的比赛中项目中,注射生长激素可以提高运动员的比赛成绩,因此it is banned by most professional sports,大多数专业的运动会上都banned使用生长激素,这里的banned应该是禁止.
55.A.细节理解题.文中最后一段提到注射生长激素的各种弊端,随后写到But is this enough to stop athletes from taking it?Scientists don't think so.这是否能够使运动员们停止使用这种激素,科学家说并不会,紧接着后文写到Some athletes will do all they can to win,and worry about their health later.一些运动员把赢得比赛放在第一位,其后才会考虑自己的身体,因此科学家害怕一些运动员会忽视生长激素带来的危险而继续使用它,因此答案为A.some athletes will pay no attention to the dangers of using HGH.
点评 本文是一篇科普类文章.做题时要在理解好文意的基础上,与题目有机的结合,从文章中找到相关细节性的句子与选项细细比对,进行选择或推理判断,选出符合文章内容的正确选项.做题注意灵活,有时可采用排除法或直选法确定出最终答案.
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