下面是现代网络教育优势的是()
A.学习终身化
B.教育名师化
C.知识建构化
D.学习内容时代化
参考答案:A, B, C, D
The short-run supply curve for a purely competitive market:()
A. slopes upward to the right.
B. slopes downward to the right.
C. is a horizontal line.
下列叙述正确的是().
A.第一产程指开始出现间歇5~6min规律宫缩开始至宫口开全
B.初产妇第一产程需6~8h
C.从宫口开全至胎儿娩出,经产妇仅需数分钟
D.从胎儿到胎盘娩出,一般需要30min
E.从胎儿到胎盘娩出,一般需要45min