清醒插管后再静脉快速诱导适合于
A．重症肌无力病人
B．估计气管插管有困难病人
C．有误吸危险的病人
D．不合作小儿
参考答案：C
因为a和b都不为0，5a=7b，所以a：b=7：5．______．
What is the key to success in the speaker’s opinion a. Know your strengths. b. Learn the right style of life from others. c. Keep learning. d. Accept your limits.
