________ Zhang Peng and Mike playing chess in the room?[ ]
A. Does
B. Is
C. Are
答案:C
偏倚又称为()。
A.系统误差
B.随机抽样误差
C.随机测量误差
D.偶然误差
E.标准误
物资盘点是对仓库保管的物资进行数量和质量的()。