腹股沟三角（直疝三角）三条边是（）.
A.腹壁下动脉
B.腹壁浅静脉
C.腹直肌外缘
D.腹白线
E.腹股沟韧带
参考答案：A, C, E
Be careful when you cross this busy street. ________, you may get run over by a car.
A．If not
B．If so
C．If any
D．If possible
“若今赴刑场，罪犯犹惊怖，口干眼凸出，形貌异故昔”，这一颂的比喻有哪两种解释方法？
