包装、标签有效期的表达方法是
A．按批号排序B．按生产序号C．按生产记录存档号D．按出厂日期E．按年月顺序
参考答案：E
已知奇函数f（x）是定义在（-2，2）上的减函数，若f（m-1）+f（2m-1）＞0，求实数m的取值范围．
计算题。
1. Kate has a quzuler more books than Peter and Peter has a third more books than Jill.
Altogether they have 120. How many books does each person have?
Answer: __________________________________________________________
2. What weight must be placed at "?" to balance the Scale?
Answer:____________________________________________________________
