问题
多项选择题
数控镗床上加工的毛坯材质要均匀，（）须经过高温时效消除内应力，以达到经过多工序加工后工件变形最小的目的。
A.铸件
B.锻件
C.结构件
D.半成品件
E.粗加工件
F.半精加工件
答案
参考答案：A, B
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数控镗床上加工的毛坯材质要均匀，（）须经过高温时效消除内应力，以达到经过多工序加工后工件变形最小的目的。
A.铸件
B.锻件
C.结构件
D.半成品件
E.粗加工件
F.半精加工件
参考答案：A, B
| 选词填空（用适当形式）。 | |
2. To make sure that he was at home, I ____ him ____ in advance. 3. Just___ with it, and you will succeed. 4. The whole things were ____ , and mother was angry. 5. ____ solving the problem now. 6. She____the water and came up coughing. 7. The shepherd____to look for the sheep that had wandered away. 8. He was very angry and____before I finished my sentence. 9. He was very busy then and promised to ____ later. 10.____ ,he would visit me in the countryside. |