畸形工件需多次划线时，为保证加工质量必须做到（）。
A.安装方法一致
B.划线方法一致
C.划线基准统一
D.借料方法相同
参考答案：C
根据句意字母提成句子，每空一词
1. I u to be a football player, but now I am a teacher.
2. There is nobody in the bus. It is e .
3. Don't forget to 1 the door when you leave the room.
4. Do you know who i the first computer?
5. If you want to remember the English new words, you should read it a .
儿童在词汇语义发展上表现出哪些特点?
