缺血缺氧性脑病
参考答案：
胎儿严重缺氧，造成脑损伤、坏死，导致脑瘫等终身残疾。
解不等式||x+3|-|x-3||＞3．
----- How about the book you are reading now?
----- Excellent indeed. You can find many problems we have come across _____ in it.
A．covered
B．covering
C．are referred
D．referred
