Guangdong Play to Learn Technology Co.,Ltd
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(中文) 3-2用气球驱动小车
(中文) 3-3用橡皮筋驱动小车
(中文) 3-4弹簧测力计
(中文) 3-5运动与摩擦力
(中文) 3-6运动的小车
(中文) 3-7设计制作小车一
(中文) 3-8设计制作小车(二)
(中文) 1-1有关光的思考
(中文) 1-2光是怎样传播的
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