单项选择题PN结反向偏置电压的数值增大,但小于击穿电压,( )。 A、其反向电流增大 B、其反向电流减小 C、其反向电流基本不变 D、其正向电流相应增大
单项选择题The substance most likely to pass through the glomerular filtration membrane is A、negatively charged small molecules B、positively charged small molecules C、macromolecules that are electrically neutral D、macromolecules that are positively charged