Susan had long blonde hair and big blue eyes.So did most of the other 1 in her school class,which troubled her a lot.”I look like everyone else! I’m not special! I’m boring!”Susan 2 to her mother. She decided to try to make herself look 3 .She painted big pink spots on her neck and when she didn’t get attention,she stuck a long plastic nose on top of her real nose.Nobody noticed that, 4 .She took ink(墨水)and poured it all over her 5 .She wore clown(小丑)clothes to school and stuck leaves in her ears. 6 no matter what she did.she在LC电磁振荡电路中有振荡电流存在,理想的情况是能量没有损失,振荡电流的振幅保持不变.但实际的振荡电路如果没有外界能量的及时补充,振荡电流的振幅总是要逐渐减小的.下面的几种情况中,哪些是造成振幅减小的原因( ) A.线圈自感电动势对电流的阻碍作用 B.电路中电阻对电流的阻碍作用C.线圈中铁芯内感应电流产生热量 D.向空间辐射电磁波