你何必为已发生的事没完没了地自责？Why do you persist in blaming yourself for what happened?你何必自找麻烦为你姐姐的狗所累 呢 ?Why do you burden yourself with your sister's dog?你何必替这种人卖力?Why should you work so hard for these people?...
We shall take the typical emitter - to - base resistance as about 250 ohms.我们取发射极基极电阻的典型值为250欧姆左右.We have been considering the transistor with a current fed into the emitter.我们所研究的晶体管都是把电流馈入发射极.The base region is always ...
Excuse me Chongqing department of gynaecology , is the meeting after induced labor brought about infecund?只要引产后注意休息,是不会导致不孕的,这可以放心,祝好!Does abortive hind take prophylactic to you can cause gynaecology? Can infecund?流产后服用避...