弯曲是使材料产生弹性变形,因此只有弹性较好的材料才能进行弯曲。 发布时间:2017-07-01 23:40 │ 来源:www.tikuol.com 题型:判断题 问题: 弯曲是使材料产生弹性变形,因此只有弹性较好的材料才能进行弯曲。
题型:判断题 It turned out that he had forgotten to () the lens cap and all the pictures he had taken thus failed to develop.A. removeB. deleteC. eraseD. detach 查看答案