若一球体的表面积增加到原来的9倍,则它的体积增加到原来的( )倍。A.8 B.9 C.18 D.27

作者: tihaiku 人气: - 评论: 0
问题 若一球体的表面积增加到原来的9倍,则它的体积增加到原来的( )倍。
选项 A.8 B.9 C.18 D.27
答案 D
解析 表面积增加到原来的9倍,即半径增加到原来的3倍,则体积增加到原来的33=27倍。
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  • 文件: /twcms/kongphp/cache/cache_redis.class.php
  • 位置: 第 85 行
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