输卵管绝节育术的禁忌症有:()
A、盆腔炎症急性期
B、严重产后出血者
C、严重产时感染者
D、腹部皮肤感染者
E、严重贫血者
参考答案:A, B, C, D, E
The number of people at present _____ sixty, but a number of people _____ coming here to get tickets for free. [ ]
A. is; is
B. is; are
C. are; are
D. are; is
工控机刚启动时,按()键可以进入DOS界面进行DOM盘系统和硬盘系统切换