手术时发现腹壁下动脉在疝囊颈外侧应诊断为()。
A.腹股沟斜疝
B.腹股沟直疝
C.股疝
D.脐疝
E.白线疝
参考答案:B
Though he had tried to climb to the top of the mountain several times, he didn't__________________.
A.get it
B.make it
C.arrive it
D. do it
汽轮机启动过程中,按新蒸汽参数不同可分为()和()两种。