风筒吊挂要隔环必挂，尽量靠近巷道两帮，高度符合设计要求。
参考答案：错
某承陶瓷市场现出售的有边长相等的正三角形、正方形、正五边形的地板砖，某顾客想买其中的两种镶嵌着铺地板，则他可以选择的是（ ）。
David is as as Jack.[ ]
A. care
B. careful
C. more careful
D. the most careful
avid is as as Jack.[ ]