脑性瘫痪的致病因素为（）。
A.胚胎发育异常
B.胎儿感染或缺氧
C.窒息、难产
D.新生
E.核黄疸
参考答案：A, B, C, E
已知圆锥的母线长l=15cm，高h=12cm，则这个圆锥的侧面积等于______cm2．
The report that in Foshan the two-year-old girl Xiao Yueyue was ignored by 18 passers-by after
she was run over twice the public's concern about moral decline (下降).[ ]
A. set off
B. set aside
C. set about
D. set up
