题目

To water poor lands in bad weather. Every time you go shopping, the vegetables and fruit look so tempting that you wish you could buy all of them. Some people are lucky and can grow the fruit and vegetables in the gardens that they have. While getting fresh vegetables, they can also achieve great cost cutting. Mushrooms are expensive and can also go bad very quickly. Mushrooms can also be grown easily in a dark environment. In fact it’s better than growing other vegetables since you really don’t need an outdoor space. A special type of soil that is good for growing mushrooms is ea一个几何体的三视图如图所示分别是直角梯形、正方形和矩形，画出直观图，并求它的体积与表面积．