调整装配法是在装配时改变可调整件的（）。
A、尺寸
B、形状精度
C、表面粗糙度
D、相对位置
参考答案：D
根据句首字母补全单词。
1. I have to make a p_____for my study.
2. School is closed for the summer and children are on v_____.
3. New year is coming. I am going to post a p_____to my friend.
4. Parents must s_____their children to school.
5. He is a_____from home for a long time.
（）
A.A
B.B
C.C
D.D
（）