网络投诉须在投诉产生或收到转发后多长时间内回复（）
A.36小时
B.24小时
C.12小时
D.立即
参考答案：B
She had to ______ our young children after her husband died. [ ]
A. turn over
B. go over
C. watch over
D. take over
幼儿美育的内容有哪些？
