【单选题】【消耗次数：1】
关于交待具体用药时间，不正确的是（ ）。
①
“一日2次”通常是每12小时服药1次
②
“一日1次”的药物时，可随意在一天的任何时间服药
③
“一日3次”是指每8小时服药1次
④
“睡前”是指睡前15~30分钟
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