在内存中，每个基本单位都被赋予一个唯一的序号，这个序号称之为（）
A.字节
B.编号
C.地址
D.容量
参考答案：C
故乡山水如此令人神往，想必会触发你的文思。请根据对联的上联，对出下联（宽对即可）。
上联携友览青山叠翠步步高
下联____________________
—Is your brother a League member?
—Yes, he _____ the League three years ago. He _____ a League member for three years.[ ]
A. joined; has been
B. has joined; has been
C. was joined; is
D. joined; was
