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种子萌发需要适宜的环境条件,包括适量的        ,适宜的        和充足的         
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科目:初中英语 来源: 题型:阅读理解

Many cultures have different ideas about why people catch colds. For example in the United States, some people think that you can catch a cold if your feet get cold. So, mothers tell small children to wear warm boots in the winter. In other places, including parts of the Middle East, some people believe that strong winds cause colds. So, on trains and buses, people usually don’t like to sit next to open windows. In parts of Europe, some people think that wearing wet clothes will give you a cold. They say that after you go swimming, you should quickly put on dry clothes. Today, scientists know that colds are caused by a virus(病毒). But the old ideas are still very strong, and many people still follow them to avoid(避免)getting ill.
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D.In the U.S., many small children wear boots in winter.
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