问题 问答题 简答题

与常规脉冲激光加工相比,飞秒激光微加工有哪些优点?

答案

参考答案:

①耗能低,无热熔区,“冷”加工;

②可加工的材料广泛:从金属到非金属再到生物细胞组织;

③不会出现加工面的熔融、裂缝现象。高精度、高质量、高分辨率,加工区域可小于焦斑尺寸,突破衍射极限;

④非接触,无飞溅无熔渣、无污染、不需特殊的气体环境和无后续工艺。

材料分析题

八年级学生小明,经常帮妈妈做家务。一次,他突然想到一个主意,给妈妈开一份本周做家务的帐单,放在妈妈的床头,第二天,小明醒来时也发现一份妈妈给自己的帐单……

(1)小明的做法是孝敬父母的表现吗?为什么?

                                                                                                                                                              

                                                                                                                                                               

                                                                                                                                                               

(2)联系材料,在孝敬父母方面,你打算怎样做?

                                                                                                                                                               

                                                                                                                                                                

                                                                                                                                                                

                                                                                                                                                               

问答题 简答题