佝偻病（）
A.梭状指
B.杵状指
C.爪形手
D.匙状指
E“X”形腿
参考答案：C
一台电动机额定电压为220 V，线圈电阻R="0.5" Ω，电动机正常工作时通过电动机线圈的电流为4 A，电动机正常工作10 min，求：
（1）电动机消耗的电能.（2）电动机内阻产生的热量。
Speaker A: Excuse me, could you tell me how to get to the railway stationSpeaker B: ______
A．Yes, of course I can.
B．Well, you'd better not ask a stranger.
C．Sorry. I'm a stranger here myself.
D．Yes, you can take a taxi. It's more expensive, but it's quicker.
