We are looking forward ______ a great day. [ ]
A. to
B. for
C. of
D. at
答案：A
Access中产生的数据访问页会保存在独立文件中，其文件格式是（）。
The maximum number of data that can be expressed by 8 bits is（）.
A．64
B．128
C．255
D．256
