霍乱典型病例发病后最先出现的症状是
A．畏寒、发热
B．呕吐
C．腹痛
D．腹泻
E．腓肠肌痛性痉挛
参考答案：D
—I don't feel myself now.
—________
A．Don't do that，please.
B．It's impossible.
C．What's the matter?
D．Why do you want to feel yourself?
汽温调整过程中应注意哪些问题？
