蓝宝石在散射光下或油槽中颜色在棱线及棱线交接部位加深,这颗蓝宝石是()处理的.
参考答案:表面扩散
单词拼写:请根据句子意思及所给的中文或首字母提示完成单词。
1. Liu Jun is a good student. He works very h________.
2. John is a rich man. He has a lot of m________.
3. We usually w________ school uniforms on weekdays.
4. Mr. Green reads n____________ every morning. So he always knows the latest(最新的) news.
5. You are ill. You'd better see a d_________.
6. Jimmy writes a new school _________(剧本).
7. What _________(其他的) jobs do you want?
8. This __________(夏天), I will go to the US to visit my aunt.
9. He is a waiter and often works________(晚).
10. Children can not play with a knife(小刀). It's too ___________(危险的).
材料需要量计划,主要用于确定()
A.场地堆放,材料运输
B.运输能力
C.工程进度
D.劳动量计划