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在美国,5~17岁孩子中有10%~15%的人有这样那样的学习上的障碍。早期的分析及干预是非常重要的。因为—些特别的训练手......

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A. First class delivery will cost 7 dollars.B. Third class delivery will take a fortnight to arrive.C. First class is a popular means of delivery.D. Third class costs only a dollar fifty but it is slow in delivery.
A. First class delivery will cost 7 dollars.
B. Third class delivery will take a fortnight to arrive.
C. First class is a popular means of delivery.
D. Third class costs only a dollar fifty but it is slow in delivery.
问答题
锻炼是减少心脏病和呼吸系统疾病的最有效的方法,同时对身体健康也起到相应的作用。锻炼越多,对身体越好。但即使是一般的运动量也有助于减少死亡的威胁。[听力原文]Exercise appears to be most effective in reducing risk of death from heart disease or respiratory problems, but it also has an effect on other health conditions. The more exercise, the better, but even moderate exercise lowers death risk.
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