问题
填空题
生物体内的主要遗传物质是DNA，它主要存在于（）
答案
参考答案：细胞核
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生物体内的主要遗传物质是DNA，它主要存在于（）
参考答案：细胞核
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| Traffic means everything and everybody is using the roads. Today more and 1 people live in cities. So there is 2 traffic and usually not enough 3 , and 4 of the roads are too narrow. That is 5 there are a great many accidents. In cities 6 over the world thousands 7 people die or 8 hurt in traffic accidents. Of course, traffic accidents also 9 outside cities in the countryside, but there is not 10 much traffic, so there are not so many accidents. | ||||
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