无菌切口是指（）
A.腹股沟疝修补术
B.胃大部切除术
C.胆囊切除术
D.阑尾穿孔切除术
E.小肠部分切除术
参考答案：A
In order to finish the experiment successfully, the professor always _________, for every day the light in his room didn’t go out until 4 a.m.
A．mixed up
B．cleaned up
C．turned up
D．stayed up
课程评价
