答：一共可以装成50箱．
栽树110棵，全部成活，成活率是110％。
The Children were so excited that they could speak.
790÷70的余数是（ ）
设函数f（x）=|2x﹣1|，实数a＜b，且f（a）=f（b），则a+b的取值范围是 ____．
