问题 单项选择题

Aspirin is one of the safest and most effective drugs invented by man. The most popular medicine in the world today, it is an effective pain reliever. Its bad effects are relatively mild. It is also cheap.For millions of people suffering from arthritis, it is the only thing that works. Aspirin, in short, is truly the 20th-century wonder drug. It is also the second largest suicide drug and is the leading cause of poisoning among children. It has side effects that, although relatively mild, are largely unrecognized among users.Although aspirin was first sold by a German company in 1899, it has been around much longer than that. Hippocrates, in ancient Greece, understood the medical value of tree barks and leaves which today are known to contain a chemical found in aspirin. During the 19th century, there was a great deal of experimentation in Europe with this chemical, and it led to the introduction of aspirin. By 1915, aspirin tablets were available in the United States.A small quantity of aspirin relieves pain and inflammation. It also reduces fever by affecting some of the body’’s reactions. Aspirin is very irritating to the stomach lining. The best way is to chew the tablets before swallowing them with water, but few people can stand the bitter taste. Some people suggest crushing the tablets in milk or orange juice.

Which of the following statements is NOT true

A.Aspirin is good to arthritis sufferers.

B.Aspirin may be used as suicide drug.

C.Aspirin is dangerous to small children.

D.Aspirin has unrecognizable side effects.

答案

参考答案:C

解析:是非题型。见文章第二段:For millions of people suffering from arthritis,it is the only thing that works.Aspirin,in short,is truly…It is also the second largest suicide drug…are largely unrecognized among users.对于数百万关节炎患者来说,阿司匹林是唯一有效的药;简言之,它是20世纪真正的灵丹妙药。它还是第二大的自杀用药和儿童中毒的主要原因。尽管它的副作用很小,用药者却对之不甚了解。由此可知:选项A、B均有提及;虽然文章提及阿司匹林是儿童中毒的主要原因,却没谈及中毒原因,所以不能简单认定它对小儿危险,则选项C未被提及应是答案。而选项D的内容本段最后一句有所提及。

单项选择题
单项选择题

美国圣母大学尼尔·卡松教授领导的粒子物理研究小组与美国布鲁克海文国家实验室及其他5所大学的科学家,利用r介子轰击液氢,找到了一种理论上早已预言的奇异分子存在的证据。 现代物理学理论认为,介子与质子、中子等基本粒子一样也是由夸克所组成,但又不同于质子和中子这类由3个夸克所构成的胶子。普通介子则由一正一反的2个夸克构成。介子种类较多,但因其寿命很短,性质也不稳定,在人们日常生活中不存在。尽管理论物理界早在20世纪70年代末期预言介子还有一种新的形态——奇异介子存在,但在近20年来科学家仍未能捕捉到这种新粒子的蛛丝马迹。 寻觅奇异介子的实验始于1989年,曾获得了美国国家科学基金会和能源部的大力支持。借助于布鲁克海文国家实验室的大型粒子加速器,通过对粒子碰撞后残余物的分析,研究人员终于确信,介子家族还存在一种从未见过的新成员,该介子由一对正反夸克和胶子组成,它便是理论中预言已久的奇异介子。 尼尔·卡松教授认为,新发现对于深刻认识和理解基本粒子之间的相互作用力意义重大,如果该研究成果获得进一步证实,则有关奇异介子的研究将有可能揭示出夸克构成宇宙万物的细节。奇异介子的发现引起美国物理学界的极大关注,美国橡胶岭国家实验室的理论物理学家特德·巴恩斯博士对该研究成果给予了高度评价。

下列解说,不符合文意的一项是()。

A.美国科学家20世纪70年代末就开始寻找奇异介子,一直未捕捉到它的蛛丝马迹

B.尼尔·卡松等人借助布鲁克海文实验室的粒子加速器证明了奇异介子的存在

C.奇异介子的发现引起美国物理学界的极大关注,特德·巴恩斯给予了高度评价

D.对于奇异介子的发现,还需要进一步的证实