在Java的基本数据类型中，char型数据占2字节内存空间，int型数据占用__________字节内存空间。
参考答案：4
When did you buy these new CDs?
I them for two days.
A. had B. have bought C. have had
新设置的水准点应根据建筑施工的规模、对高程的精度要求、使用期限等方面作全面考虑。( )
