数控系统的控制对象是( )。
A．伺服系统
B．位移装置
C．传动装置
D．液压系统
参考答案：A
— There's too much salt in the Chinese diet.
— So there is. The WHO says only 1.5 grams of salt _____ for each man every day. [ ]
A. is needed
B. needs
C. will need
D. has needed
T11的主电路板编号“30”是（）
A.直接来自蓄电池正极
B.经过点火开关
C.经过点火开关，起动时断开
D.搭铁线
