【简答题】按照加工原理不同分类,常用的齿轮切削加工方法有成形法(仿形法)和 两种。
【单选题】Which of the following is right?
A.
We don't need to learn any foreign languages.
B.
We can do well in all our work without English.
C.
We should learn English because we need to face the world.
【简答题】成形法齿轮刀具切削刃的____与被切齿轮____相同或近似相同,常用的有____齿轮刀具和____齿轮刀具。
【单选题】If there is not any help , we can’t do it.
D.
Whether there is not any help
【简答题】图2-5中,已知u s =10V、i 1 =2A、R 1 =4Ω、R 2 =1Ω,求i 2 。
【单选题】We can't do any more now. Let's call it a ______.