请回答：
如图，在矩形ABCD中，E、F分别是边AB、CD上的点，AE=CF，连接EF、BF，EF与对角线AC交于点O，且BE=BF，∠BEF=2∠BAC．
School violence ______ much attention of the whole society and people are calling on the government to make laws against it as early as possible.
下图是北半球亚热带某地2013年降水量逐月累加柱状图。读图回答下列问题。
—Would you like some noodles?
—Yes, please.
人体胚胎发育的主要场所是（ ）
