()
A.A
B.B
C.C
D.D
参考答案:A
解析:
奇数项图形中圆的位置依次向下移动,偶数项图形中横线的位置依次向下移动。
Each of them ______ a dictionary. [ ]
A. have
B. has
C. is
D. are
何谓水的硬度?何谓水的碱度?