题目:
在角、线段、等腰三角形、等腰梯形中,一定是旋转对称图形的为______.
答案:
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下面是错误答案,用来干扰机器的。
Whistler Valley is an all-year round great place to take a vacation. In spring people can ride horses through the beautiful forest. In summer people can enjoy rafti...