hCG的清除一般在肝脏，肠道和肾脏进行。()
参考答案：错
The teacher has a(an) ___________ to get off topic; sometimes it is difficult for students to make out what he is saying.
A．concern
B．determination
C．intention
D．tendency
肺动脉主干栓塞引起患者猝死的原因不包括（）
A.肺梗死
B.冠状动脉痉挛
C.支气管动脉痉挛
D.右心衰竭
E.肺动脉痉挛
