题干

为了对比研究实心球圆柱体和圆锥体对支撑面的压力作用效果,某同学选择了同种材料制成的高度相同,底面积不同的若干实心圆柱体和圆锥体,分成三组放置在水平细沙面上,其中每组的圆柱体与圆锥体的底面积相同,沙面的凹陷程度如图所示.

①分析比较图(a)或图(b)或图(c)可知____.

②分析比较图(a)或图(b)或图(c)可知____.

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答案(点此获取答案解析)

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同类题3

    阅读短文,掌握人意,然后从所给的A、B、C、D四个选项中选出最佳选项。

    My family and I were taking a long-expected vacation to Disneyland. I had never been there before and was1to experience the magic.

    There was another reason that this trip was2. Being a workaholic(工作狂),my father worked long hours.I longed to spend time with him. I wanted to be able to3with my father, who I loved more than life,and just talk. It always seemed like there was never time.

    The day finally arrived 4I was allowed to pack my luggage(行李).I chose only my favorite clothes,then tried to zip(拉拉链)up the bag full of clothes.I didn't get any5that night.I lay in my bed,feeling6.My father's work was going to be left at home,finally.

    After breakfast we hit the open road.It was smooth sailing for the first hour7I unexpectedly felt a sudden move.We coasted to the roadside,and my dad said8was wrong with the engine(引擎).We were in the middle of the passing9,so he decided the easiest thing to do would be to flag someone down and get a ride into town.

    An hour later, my dad was still10 his hands at each and every passing car but it wasn't doing any good.Nobody would stop to11my family.Finally my dad gave up and decided to walk into town.It was a very long 12.My dad has a back problem and he wasn't in any condition to even walk a couple of miles.I 13him to stay and try again,but he refused,"I won't let anything stop you enjoying this trip."

    My 14had a pain as he put on his coat and began to walk away.Then I saw a person out of our car window. A man with a 15smile was heading straight toward our car…