下列哪些是肾上腺危象的诱发因素()
A．创伤
B．感染
C．呕吐
D．腹泻
E．分娩
参考答案：A, B, C, D, E
He offered to drive me to the airport, I felt so grateful.
A．to whom
B．to which
C．for which
D．for whom
何谓齿面疲劳点蚀，它是如何形成的？
