While I was away from my home last year, I always________ my family.
A:guessed
B:thought
C:missed
如图所示,通电螺线管附近的小磁针处于静止状态,则螺线管A端是 ____ 极,电源的D端是 ____极.
在Rt△ABC中,∠C=90°,AC=3cm,BC=4cm,以点C为圆心2cm长为半径的圆与AB的位置关系是( )