题干

学习了化学可以帮助我们解释生活中的一些现象:

(1)高层建筑常采用铝合金门窗,而不采用铁门窗,____ .

(2)富含维生素C的蔬菜烹调时不能加热时间过长,是因为维生素C____ .

(3)活性炭可用于除去色素或臭味,是因为活性炭具有____ 能力.

(4)50mL水和50mL酒精混合在一起,总体积小于100mL.____ .

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答案(点此获取答案解析)

铝合金耐腐蚀、硬度大、密度小,受热易分解,吸附,分子间存在间隔

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    Many years ago three soldiers, hungry and tired of battle, came upon a small village. The villagers, suffering a bad harvest and the many years of war, quickly hid what little they had to eat and met the three in the village square, shaking their heads and sighing, “Well, we are starving.” The soldiers communicated with each other quietly and then the first soldier turned to the villagers. “Your poor fields have left you nothing to share, so we will share what little we have: the secret of making soup from stones.”

    Naturally the villagers were intrigued and soon a fire was built to the villager's greatest pot, and then the soldiers dropped in three smooth stones.

     “Now this will be a fine soup,” said the second soldier, “but a handful of salt and some parsley (香芹) would make it wonderful!” Up jumped a villager, crying “What a piece of luck! I've just remembered where some has been left!”

    And off she ran, returning with parsley. As the pot was boiling, the memory of the villagers improved: soon carrots, beef and cream had found their way into the great pot. They ate and danced and sang well into the night, thrilled about the feast and their new-found friends. In the morning the three soldiers awoke, finding all the villagers standing before them. At their feet lay a bag of the village's best bread and cheese. “You have given us the greatest gift.” said an elder, “and we shall never forget.” The third soldier turned to the crowd, and said, “There is no secret, but this is certain: people working together can accomplish great things.” At last the light dawned on villagers. Off the soldiers wandered, down the road.