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  3. A century ago American men outnumbered and outlived the women. But in the 20th century, women began living longer, primarily bec

A century ago American men outnumbered and outlived the women. But in the 20th century, women began living longer, primarily bec

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问题 A century ago American men outnumbered and outlived the women. But in the 20th century, women began living longer, primarily because pregnancy and childbirth had become less dangerous. The gap grew steadily. In 1946, for the first time ever in the United States, females outnumbered males. Part of the reasons are self-inflicted. Men smoke more than women, drink more and take more life-threatening chances. Men are murdered (usually by other men) three times as often as women are. They commit suicide at a higher rate and have more than twice as many fatal car accidents as women do.
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答案 一百年前，美国男性不仅数量比女性多，寿命也比女性长。到了20世纪，女性平均寿命却超过了男性，这主要是因为怀孕与分娩的危险性降低了。这种差距一直在扩大。到1946年，美国的女性人数首次超过了男性。究其原因，一部分是男性自己造成的。男性吸烟多于女性，酗酒也多，遭遇凶险的机会也多。男性遭到谋杀(常常是遭其他男性谋杀)的几率是女性的三倍。他们自杀的比率也较高，因车祸死于非命的也比女人多出一倍有余。
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