腹股沟斜疝与直疝主要鉴别点是（）。
A.发病年龄不同
B.有无咳嗽冲击感
C.压迫内环后疝是否再突出
D.嵌顿机会的多少
E.疝块外形不同
参考答案：C
-Is there anything I can do for you, sir?
-Well, I am looking for _____ is in charge of the experiment.
A. whoever
B. whomever
C. no matter who
D. no matter whom
多气门
