如图，开关S闭合后，下列说法正确的是
A．电磁铁A的上端是N极
B．弹簧具有弹性势能
C．电动机不工作
D．电灯正常工作
答案：B
—Peter has changed a lot, hasn’t he?
—Yes. He used to the guitar, but now he is more in playing soccer.
A．plays; interested
B．play; interested
C．play; interesting
D．playing; interest
建筑装饰装修工程验收前应将施工现场（）。
A、施工结束
B、清理干净
