坯料拉深时,其凸缘部分因受切向压应力而易产生失稳而起皱。
参考答案:对
His plan _____ when it was put into practice because he had not given enough attention to details.
A.broke down
B.broke up
C.broke out
D.broke away
下列音乐流派都曾在世界乐坛盛行一时,按时间先后排列正确的一组是()。
①古典主义
②印象派
③现代派
④浪漫主义
A、①②③④
B、①③②④
C、①④②③
D、①②④③