铜丝疏绕屏蔽时，铜丝的排列要尽可能均匀，铜丝的平均间隔不大于（）mm。
A.3
B.4
C.5
D.8
参考答案：B
句型转换。
1. My cousin and I are different. (变否定句)
My cousin and I ____________ ____________ different.
2. They go for a walk in the evening. (变一般疑问句，作肯定回答)
____________ they ____________ for a walk in the evening?
____________, ____________ ____________.
输送空压机系统启停操作顺序。
