工件均匀受热变形主要影响其形状精度。
参考答案：对
老师给同学买了3箱矿泉水，每箱24瓶，每瓶3元钱，这些矿泉水一共要花多少钱？（用两种方法解题）
During the last Olympics, all the rooms in the Olympic Village in London are so designed that they are （）to the disabled.
A．accessible
B．available
C．convenient
D．valid
