我国孕产妇死亡的第一位原因为（）
A.产科出血
B.妊娠高血压疾病
C.羊水栓塞
D.妊娠合并心脏病
E.产褥感染
参考答案：A
This urban special school always accepts hearingimpaired students, ________ their educational level and background.
A．according to
B．regardless of
C．in addition to
D．in terms of
Businesses may be of different shapes and sizes.
