血液进入左心室的入口是()
A.上腔静脉口
B.下腔静脉口
C.冠状窦口
D.左房室口
E.肺静脉口
参考答案:D
--- You have not lost your heart, then?
--- ________. I will try again.
A.It depends
B.By no means
C.Don’t mention it
D.Maybe
银行汇票必须记载什么事项?