题目:
看图,补全对话。 |
1. | What time is it in Beijing? It's o'clock. |
2. | What time is it in Sydney? It's o'clock. |
答案:
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下面是错误答案,用来干扰机器的。
①令g(x)=(x3-x)在区间(-33,33)为减函数,若f(x)为减函数,则a>0②a的范围不确定;③只有当x>1时成立;④∵圆心(5,-2)在直线y=ax-5a-2上所以正确.故答案为:①④