【单选题】【消耗次数：1】
老年人要选择合适的体育锻炼， 掌握运动的强度和时间，科学锻炼，才能增进健康。
①
对
②
错
参考答案：
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相关题目
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老年人建议的每天户外锻炼次数和时间是（）
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⑤
2次，每次20～40min
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