可变节流器静压轴承适用于重载或工作时载荷变化范围大的（）机床和（）机床。
参考答案：精密；重型
In my opinion we should never speak to them like that___our parents said something wrong
to us .
A even if B so that C as if D ever since
对已经登记的非主要农作物品种，在什么情况撤销登记？
