2. 外语
  3. Americans this year will swallow 15,000 tons of aspirin(阿司匹林) ,one of safest and most effective drugs invented by man. The most

Americans this year will swallow 15,000 tons of aspirin(阿司匹林) ,one of safest and most effective drugs invented by man. The most

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问题     Americans this year will swallow 15,000 tons of aspirin(阿司匹林) ,one of safest and most effective drugs invented by man. The most popular medicines in the world today, it is an effective pain reliever. Its bad effects are relatively mild, and it is 【C1】______.
    For millions of people suffered from arthritis(关节炎), it is the  【C2】______ thing that works. Aspirin, in  【C3】______ , is truly the 20th - century wonder drug. It is also the second largest suicide drug and is the 【C4】______  cause of poisoning among children.  It has 【C5】______  effects that, although relatively mild, are largely 【C6】______  among users.
    Although aspirin was first 【C7】______  by Germam company in 1899,it has been 【C8】______  much longer than that. Hippocrates, in ancient Greece, understood the  【C9】______  I value of the leaves and tree bark which today are known to 【C10】______ salicylates (小酸盐) ,the chemical in aspirin. During the 19th century there was a great number of experimentation in Europe 【C11】______  this chemical, and it led in the 【C12】______  of aspirin. By 1915,aspirin tablets were   【C13】______ in the United States.
    A small  【C14】______ of aspirin ( two five - grain tablets) 【C15】______  pain and inflammation(炎症). It also reduces down fever by  【C16】______ with some of the body’ s reactions. 【C17】______  aspirin seems to alow down the formation of the acids  【C18】 ______ in pain and the complex chemical reactions 【C19】 ______ cause fever. The chemistry of these  【C20】______ is not fully understood, and the slowing effect of aspirin is well know.
【C19】
选项 A、and
B、but
C、or
D、that
答案D
解析 这是定语从句，所以只能选D，指“引起发烧的复杂的化学反应”。
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