不宜做硬膜外麻醉的是（）
A.高血压、心脏病
B.低血容量休克
C.椎管内转移癌
D.妊娠高血压症
E.出凝血机制障碍
参考答案：B, C, E
.I have a __________sister.
A.9-years-old B.9 years old C.9-year-old
—Have you seen my brother?
—Yes. I _____ him in the library five minutes ago.
A.have met B. met C.meet
