为削除交越失真，通常要给功放管加上适当的正向偏置电压，使基极存在的微小的正向偏流，让

In China, if people have a cold and they don’t think it’s serious,   小题1:  There they can buy the medicine they need. They can also get some advice about their illnesses from the doctors and they are told what they should do.  小题2:
If their illnesses are a little more serious.  小题3: Doctors usually ask about their trouble, check them over with equipments（仪器）and then give them a prescription（处方）.  小题4: they may have to stay in hospital.
When people, especially（特别）the old or the babies, are badly ill, they can call 120 for help. the ambulance（救护车）can take them to the hospital as soon as possible.   小题5: 

A．It’s quite easy and cheap. B．If they have a much more serious disease. C．They may go to see the doctor. D．They may go to a medicine shop or a community service center for help. E．Doctors will give them first aids（救助）at first time.