【简答题】There are many people who believe sincerely that you can train children for life without turning to punishment for help. (resort to)
【判断题】2-1、 梁的挠曲线近似微分方程为 EIy’’=M(x)。
【判断题】梁的挠曲线近似微分方程为 EIy ’’ =M(x) 。
【简答题】 Suppose you have received the following invitation to a graduation party. For some reason, you can’t attend the party. Write a reply to the invitation. Dear Wang Ling, You are invited to attend our ...
【简答题】计算: (1)(﹣5)+12 (2)22+(﹣4)﹣(﹣2)+4 (3) (4) (5) (6)