题目内容

The boy was missing. His parents were very concerned about his safety.

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果蔬属于酸性食品。()

机械采收果蔬的优点是适用成熟不一致果蔬、损伤少;缺点为效率低、成本高。()

酒后喝酸奶能保护胃黏膜、延缓酒精吸收。()

一般来说，晚熟品种的耐藏性比早熟品种的耐藏性要差。()