初产妇，30岁，妊娠38周，自然分娩一健康男婴， * * 侧切，胎盘也正常娩出。产后1小时

同沉积褶皱

函数y=x²-2mx+4在[2，+∞]上单调递增，则实数m的取值范围是 ______．

半轴的支承型式分为（）和（）两种。

以下直流系统中额定输送容量为3000MW的有（）。

A.葛南直流

B.灵宝直流

C.宜华直流

D.江城直流

Your usual teacher has lost his voice and ______ I am taking his place today.

A．nevertheless

B．however

C．moreover

D．accordingly