题目内容
人体在凌晨一点到三点需要进入深度睡眠状态，才能养足肝血，护养肝经。（）
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Our body grows most while we are asleep. The _____ children usually need more sleep. After we have plenty of rest, we can do our lessons better. Boys and girls about fifteen need nine hours of sleep. If we don't get enough _____ air, we will feel tired when we wake up. While in bed, we mustn't _____ our head. Our lungs need to get enough air, so we'd better open our window _______ and let fresh air in. Scientists say that cool air is better than _____ and sleeping in heated rooms does no good to our health.
在澳洲,见到可爱的宝宝,请不要随意拍照晒朋友圈。因为按澳洲的法律规定,未经父母允许,擅自给未满14岁儿童拍照是违法的。
肺循环起始于
体循环的血液最后流入
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