硬膜外穿刺针和导管误入血管的发生率约()
A.0.01%~0.19%
B.0.2%~2.8%
C.3.0%~4.0%
D.4.1%~5.5%
E.5.6%~10%
参考答案:B
She was moving out of her old apartment _____ she suddenly realized that the key to the new apartment
wasn't on her. [ ]
A. until
B. once
C. when
D. as if
害虫主要防治方法