1.Who are the clubs open to?2.How many clubs can a student join?
查看答案
What does the passage talk about?It talks about________ .
A. use of the Internet
B. the number of the students
C. American school clubs
D. students' free-time activities in China
数控机床中,转速功能字S可指定( )。
A. m/min
B. r/min
C. mm/min
D. mm/s
G17、G18、G19指令可用来选择( )平面。
A. 曲线插补
B. 直线插补
C. 刀具半径补偿
D. 不运动
数控铣床的默认加工平面是( )。
A. XY平面
B. XZ平面
C. YZ平面
D. XYZ轴
微信支付 
支付宝支付