在图中,若闭合开关S后要使A、B两个螺线管相排斥,请在图中画出螺丝线管A的绕线方向。
选出恰当的应答语。
(____)A.He's from Canada.
(____)B.No,he isn't.He's my teacher.
(____)C.OK.Here you are.
(____)D.I have fourteen.
(____)E.It's in your desk.