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【单选题】
约束带只能短暂使用一次,定期时间是A.
每2小时一次。
B.
每4小时一次。
C.
每8小时一次。
D.
每12小时一次。
E.
每24小时一次。
拍照语音搜题，微信中搜索"皮皮学"使用
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