excel2003中常用工具栏中的第一个按钮也可以新建工作簿。
参考答案：对
放疗中使用的高能电子束指至少能穿过2cm以上水的电子束，即能量大于或等于（）
A.200kV
B.4MeV
C.6MeV
D.7.5MeV
E.50kV
I assure you that the matter______as quickly as possible. Have a little patience.
A．has been attended to
B．will be attended to
C．is attended to
D．has attended to
