如图所示的装置中，当闭合开关、导体ab中有电流通过时，导体ab就会运动起来，关于这一现象的说法，正确的是（　　）

____ ____ his bag?

红薯、土豆、大米是富含糖类的食物．（判断对错）

⑴What's your favourite season?____                           A. It's sunny and cool.

⑵Why do you like winter?____                                    B. I can swim.

⑶I like spring.____                                                       C. Autumn.

⑷What can you do in summer?____                           D. Because I can skate.

⑸What's the weather like in autumn in Beijing?____  E. Me too.