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小熊在课外科技读物上看到这样一个小实验:用一张崭新的纸片可以托起一满杯倒置的水.这引起了他强烈的好奇心:纸片遇到水,不一会儿就会破掉,怎么能“托”起一杯水呢?他回到家中,马上找到家中的玻璃杯和打印纸,按照科技读物上的实验步骤做起了实验.他先用玻璃杯接了一满杯水正立放在桌面上,如图1;然后把打印纸剪成稍大于杯口的正方形,把纸片轻轻盖在玻璃杯口,并且
Cubs in the extracurricular science and technology reading to see such a small experiment: with a brand new piece of paper can hold up a cup of water upside down.This caused his intense curiosity: the paper encountered water, will soon be broken He returned home and immediately found the glass and paper in his home, experimenting with the experimental steps on scientific readings, and he first took a full glass Glass of water is erected on the desktop, as shown in Figure 1; then cut the paper into a slightly larger than the square cup, the paper gently cover the glass mouth, and