明代政治家丘浚说：“天下盛衰在庶民，庶民多则国势盛，庶民寡则国势衰……民生既蕃，户口必增，则国家之根本以固，元气以壮，天下治而君位安矣。”清代乾隆帝说：“承平日久，生齿日繁，盖藏自不能如前充裕，且庐舍所占上地亦不啻倍蓰（数倍）。生之者寡，食之者众，肤甚优之”。这说明（    ）

化简：（xy﹣x²）÷$\frac{x^2-2xy+y^2}{xy}$÷$\frac{x^2}{x-y}$．

下图发生的时间是（    ）

判断。对的写正确，错的写错误。

    Can you make a yogurt fruit salad? It's not difficult. First, wash some fruit. You need a banana, an apple and some strawberries. Then cut them with a knife. Put them into a bowl. Now pour some yogurt onto the fruit. Finally mix them together. Yummy!