表镶金钢石钻头（）所用金刚石品级要求最高。
A.底刃
B.边刃
C.侧刃
参考答案：B
根据所给单词完成句子。
1. He says he ____ (be) tired.
2. He said he ____ (be) sorry.
3. She said she ____ ____ (wait) for her mother.
4. The teacher told us that the earth ____ (move) around the sun.
配制GAFAC操作步骤？
