The hare did not do anything when he found thetortoise was nearing the finish line.
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The tortoise won the race because he ran faster than the hare.
A. 对
B. 错
The moral of the story is “slow and steady wins the race.”
A. 对
B. 错
下列说法正确的是：
A. 无界数集必无聚点；
B. 有界的无限数集必有聚点；
C. 有限数集必无聚点；
D. 有聚点的数集必然是无限数集.
假定某商品的需求的价格弹性为1.6，现售价格为P=4。求：该商品的价格下降多少，才能使得销售量增加10%？
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