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问题 选择题

下列说法正确的是 [ ]

A．水和冰块的共存物是悬浊液

B．凡均一、稳定、透明、澄清液体一定是溶液

C．一定温度下，一定量溶剂里不能再溶解某物质的溶液就是该物质的饱和溶液

D．在泥水里，泥是溶质，水是溶剂

答案

答案：C

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.

The second paragraph points out that________.

A．aspirin is always safe

B．aspirin can be dangerous

C．aspirin has been long used

D．aspirin is not truly effective
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单项选择题

纳税人确有特殊困难，不能按期缴纳税款的，经( )级国家税务局、地方税务局批准，可以延期缴纳税款

A．县

B．市

C．省

D．国家
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