看下图的天平中最重的是____最轻的是____。

    Once, ____ old lion loved a girl, so he went to the girl's parents with many ____ (present) and asked them to marry (嫁）her to him.

    The parents didn't like the idea of ____ (give) their daughter to the lion but they didn't want ____ (make) the lion angry.

    Finally, the father said, "We are glad to marry ____ daughter to you, but can you promise ____ (move) away your claws (爪子) and teeth? "The lion loved the girl very much, ____ he moved away his claws and teeth.

    On the ____ (two) day, when he came to the parents, they just laughed at him and drove him away.

    The lion was angry, but he didn't have claws and teeth. He ____ (realize) that he shouldn't believe (相信）them ____ (easy) and give up his claws and teeth.

某同学用已调好的弹簧测力计测量一个放在水平桌面上的钩码的重力，他从图甲所示位置（此时指针指0刻线）开始将测力计缓慢竖直向上提起，记下测力计移动的距离h和对应的读数F，并描出F-h图象如图乙所示：

下列图形中不一定是相似图形的是（　　）