哮喘病人麻醉期间危险性较大主要是因为此类病人比一般人易发生()
A.心脏骤停
B.呼吸骤停
C.血压剧降
D.血压剧升
E.误吸
参考答案:B
It is reported that the scientists in our county are______all possible ways to control H1N1 flu.
A.operating
B.designing
C.replacing
D.exploring
冷冲压工艺规程是一种能指导全般生产历程的()。