问题
多项选择题
生产聚酯所用的消光剂有（）。
A、二氧化钛
B、三氧化二锑
C、乙二醇锑
D、硫酸钡
答案
参考答案：A, D
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生产聚酯所用的消光剂有（）。
A、二氧化钛
B、三氧化二锑
C、乙二醇锑
D、硫酸钡
参考答案：A, D
Different from popular thoughts, sometimes flu(流感) is not caused by bad weather. It is caused by viruses（病毒）in the body. 56 , A/H1N1 flu has been spreading in the most parts in the world. Some studies have now shown that one of 57 ways of spreading the viruses is through the air when 58 A/H1N1 flu-sufferer coughs or sneezes. However, its viruses can sometimes spread by 59 . After a flu-sufferer rubs his nose, the viruses might be spread to his hand. Then a friend 60 to visit him, they shake their hands. The friend then get something 61 by hands, and several days 62 , he is infected. A child 63 is carrying A/H1N1 viruses uses tissues to clean his running nose, although his parents pick up the tissues and carefully throw 64 away, they fail to wash their hands, and they will catch the viruses, too. So it is important for you to wash your hands often, it will stop the viruses from 65 in a way.
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