我们有一题考试是将考的 不知道题目有没有记对>< When a celery stalk is put in water, it becomes round and hard. The same stalk is put into salt water, it starts to shrink. The celery stalk is 然後他的答案是 hypertonic in water and hypotonic is salt water 我不懂为什麽.... 不是如果变圆变大就是hypotonic吗? 然後放在盐水里是会变小所以是hypertonic 为什麽是相反的呢>< 有没有大大可以教一下的.... Thanks~~ --

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