阅读短文，从短文下面方框中的六个句子中选择五个还原到短文中，使短文通顺完整、 衔接自然。
Someone says, "____" But I think time is even more important than money. Why? Because when money is spent, we can get it back. However, when time is gone, it'll never return. ________
It goes without saying that the time is usually limited (有限的). Even a second is very important. ____But it is a pity that there are a lot of people who do not know the importance of the time. They spend their limited time smoking, drinking and playing. ____
In a word, we should save time. ____ Remember we have no time to lose.
A. That is why we must not waste time. B. Time is money. C. They don't know that wasting time means wasting part of their own lives. D. We should make full use of our time to do something useful. E. We should make use of our time to do everything. F. We shouldn't leave today's work for tomorrow. |
离子的浓度最大的是（ ）