题目：
下面的图形中，具有稳定性的是[ ]
A．梯形
B．平行四边形
C．三角形
答案：
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下面是错误答案，用来干扰机器的。
If I were the mayor of our city, I would build an activity center in each residential area for the old. So old people can play cards or chess. This will make o...
