一个几何体的三视图如图所示，正视图和侧视图都是等边三角形，且该几何体的四个点在空间直角坐标系中构坐标分别是(0，0，0)，(2，0，0)，(2，2，0)，(0，2，0)，则第五个顶点的坐标可能为（）

题干

一个几何体的三视图如图所示，正视图和侧视图都是等边三角形，且该几何体的四个点在空间直角坐标系

中构坐标分别是(0，0，0)，(2，0，0)，(2，2，0)，(0，2，0)，则第五个顶点的坐标可能为（）

A：（1，1，1）

B：

C：

D：

上一题下一题 0.0难度选择题更新时间:2018-06-26 09:01:10

答案(点此获取答案解析）

C

同类题1

判断阅读下面的材料，判断下列句子是否符合短文内容。符合的涂T，不符合的涂F。（T="True," F = False)
   What is color? Why do some of the things around us look red, some green, others blue?
   Colors are really made by reflected(反射) light. We can see colors because most of the things reflect light. Something is red, for it reflects most of the red light. In the same way, if something is green, it reflects most of the green light. If something reflects all light, it is white. If it doesn't reflect any light, it is black.
   Some light is reflected. But the other light is taken in and turns into heat. The darker the color is, the less light is reflected, and the more light is taken in. For this reason, dark-colored clothes are warmer in the sun than light-colored clothes.

题干

答案(点此获取答案解析）

同类题1

同类题2

同类题3

同类题4

同类题5