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同学们.你们相信一只画出来的瓢虫能自己爬上塑料管吗?动脑筋想一想:怎样才能让一只画出来的瓢虫自己爬上塑料管呢?实验材料:长约50 cm的塑料管一根(内径约为6 cm)、空塑料瓶若干个(应选择刚好能放人塑料管中的塑料瓶)、磁铁两块(其中一块较小.另一块长度和塑料管内径相当)、胶带、白
Classmates, do you believe that a ladybug can be climbed up on a plastic tube? Think about it: How to make a painted ladybug climb up the plastic tube? Experimental material: about 50 cm (A diameter of about 6 cm), a number of empty plastic bottles (plastic bottle should just choose to put the plastic tube), two magnets (one of which is smaller and the other length and the plastic pipe diameter equivalent ), Tape, white