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
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