检查大盖的起吊是否均衡时，以及整个起吊时间内，禁止工作人员将（）或手伸入汽缸（）之间。
参考答案：头部；法兰结合面
A new policy formulated, _____.
A．thus did the economic reform begin
B．thus began the economic reform
C．thus had the new economic reform began
D．began the economic reform thus
紧闭式麻醉的优点有()
A．减少手术室污染
B．节省麻醉药
C．增加对病人情况了解
D．不适于地氟烷
E．保持呼吸道湿度与温度
