Most American families are smaller than the families in other countries. Children in the USA will leave their parents when they grow up. They usually live far from their parents because they want to find good jobs. They often write to their parents or telephone them. And they often go to visit their parents on holidays.

    Parents usually let their children choose their own jobs. Americans think it is important(重要的) for them to make decisions(作决定).

    Children are also asked to do some housework at home. And in many families，children will get money from their parents for doing some housework. Because American parents want to let their children learn how to make money for their own use.

根据课文《木兰从军》内容填空。

花木兰想：“父亲____，____；弟弟又小，还不够当兵的年龄。自己理应为国____。她说服了家人，____，____。

称取15.0g 此黄铜材料，向其中逐渐加入稀盐酸，测定产生气体的质量和加入稀盐酸的质量，并根据实验情况绘制了产生气体质量与加入稀盐酸的关系图．请你仔细分析此关系图，并进行计算：

When you see a fire, you can use the lift to go outside.