局部保险丝经常烧断的原因有哪些？
参考答案：
该回路元件或导线碰地；继电器绝缘垫片击穿；保险丝容量过小。
. When he fell over his own feet, his left ankle was sprained, his right hand became ______ and his nose______.
A．swelling; bleeding
B．swollen; bled
C．swelling; bled
D．swollen; bleeding
岂杀于《十三经》之启植民心“杀”的读音是（），意思是（）。
