导致阻塞性休克的原因有()。
A.喉痉挛
B.张力性气胸
C.产妇仰卧位低血压综合征
D.肺栓塞
E.心脏压塞
参考答案:B, C, D, E
My aunt left her office after she __________ her work.
A.had finished
B.finishes
C.has finished
D.was finished
下列中药材中哪一种是毒性中药()
A.斑蝥
B.土鳖虫
C.僵蚕
D.蝉蜕