破伤风引起病人一系列临床症状和体征主要因素是：（）
A.痉挛毒素
B.内毒素
C.溶血毒素
D.破伤风梭菌
E.破伤风梭菌的芽胞
参考答案：A
影响磨矿-分级机组工作的操作因素？
补全对话。
Doctor: (1)________________________________?
Jim: I have a bad headache.
Doctor: (2)________________________________?
Jim: I am feeling even worse.
Doctor: (3)________________________________?
Jim: Since yesterday.
Doctor: Let me take your temperature. It's a cold. Nothing serious.
Jim: Really? But I don't feel any better now.
Doctor: (4)________________________________?
Jim: No, I don't want to eat anything.
Doctor: Well, take this medicine twice a day. Have a good rest and drink more water.
Jim: (5)____________________________________.
