平衡精度就是指旋转件经平衡后,允许存在()的大小。
参考答案:不平衡量
All the Harry Potter books by Joanne Rowling, a poor single mother ____ in Edinburgh, ______all over the world.
A.lives; are well sold
B.living; sell well
C.lives; sell good
D.living; are well sold
接触生物机体的环境污染物透过生物膜的生物转运过程,主要分为()、()和()三种方式。