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在用天平称物体的质量时，向右盘中添加砝码应当按____的顺序(选填“由小到大”或“由大到小”)。在调换砝码的大小时发现，如果添加最小的砝码嫌多，而取出最小的砝码又嫌少，这时应采取____的方法使天平恢复平衡。
I'm Tony. I'm a boy. I live in a big house with my family. I have a sister and a brother. My sister likes to draw pictures and sing. My brother likes to play football. We all go to school by bus. My mother works in a hospital. She is a doctor. My father has a farm. The farm is very big. We like to go for a walk together. I love my family.
AB两只青蛙跳跃游戏，A每次跳10厘米，B每次跳15厘米，它们每秒都只跳1次，且一起从起点开始，在比赛中，每隔12厘米有一陷阱，当它们中第一次掉进陷阱时，另一只距离最近的陷阱有（ ）厘米．
