目前国内最常用的制作烤瓷桥金属底层支架的方法是（）。
A.整体铸造法
B.焊接法
C.烤瓷前焊接法
D.烤瓷后焊接法
E.分段铸造法
参考答案：A
用括号中所给词的适当形式填空。
1. I like _____ (China) action movies.
2. Beijing Opera is _____ (real) fun!
3. The story is very _____ (interest).
4. The map is on the wall of _____ (they) mother's room.
5. Please come in and have a cup of tea with _____ (we).
6. Can you tell _____ (I) a story?
7. There are many _____ (desk) and a chair in the classroom.
8. Tom Green is an _____ (art).
9. The boy is ten _____ (year) old.
10. My birthday is June _____ (five).
简述文件、档案一体化管理。
