题目内容

What are people advised to do during their visit to Japan in summer？Visitors ought to______.

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什么是成分献血？

献血可以减少癌症的发病率，是因为通过献血可以排除体内过多的钠，当钠在体内含量过高超过正常值的10%，患癌症的机会就会增加。()

The government official can hardly find sufficient grounds on which to base his arguments

参加无偿献血可以促使新的血细胞的生成，使人体造血系统保持旺盛的活力。()