正常人第1秒钟的用力呼气量约为用力肺活量的()
A.50%
B.60%
C.70%
D.80%
E.90%
参考答案:D
硬膜外麻醉最危险的并发症是()
A.神经损伤
B.全脊髓麻醉
C.硬膜外血肿
D.血压下降,心率减慢
E.硬膜外腔感染
–What a pity! I didn’t attend the lecture given by Dr. Green yesterday.
—I _____, either, if my parents hadn’t reminded me.
A.wouldn’t
B.hadn’t
C.didn’t
D.wouldn’t have