临产后子宫收缩特点,下列哪项不正确
A.节律性
B.对称性
C.极性
D.缩复作用
E.持续性
参考答案:E
Among the following cities, which one is NOT a capital city of a country?[ ]
A. London
B. Tokyo
C. Sydney
D. Moscow
( )是蜂窝移动通信网的核心。
A.MS B.BSSC.BTS D.MSC