There are four seasons in China. March, April and May make the spring. June, July and August make the summer season. September, October and November make the autumn season. The rest（剩下）of months make the winter season.

    The Australia seasons are the opposite（相反的）of ours. When it's spring in China, it is autumn in Australia.

    Australia is in the south（南方）of the earth. June, July and August are the winter months. The summer is in December, January and February. It's very hot there, too.

    Near the North Pole（北极）there are two seasons. The winter nights are long. For more than two months you can't see the sun, even at noon. The summer days are long. For more than two months, the sun never sets（落下）, and there's no night.

假如一粒花生米燃烧，使锥形瓶内的20ml水由25℃升高到35℃（提示：1ml水每升高1℃需要吸收4.2 焦的热量），锥形瓶内的水吸收了____ 焦的热量．实际上此粒花生全部燃烧产生的热量比上述热量____ ．（填多或少）

观察如图，若要使图象移至视野中央，移动玻片的方向是（  ）

如图所示的电路中，电源两端电压U保持不变，小灯泡L标有“6V 3W”字样．当三个开关S₁、S₂、S₃都闭合时，小灯泡正常发光，电流表示数为0.8A；保持S₁闭合，断开S₂、S₃，电流表示数变化了0.6A．求：