—Do you know all your classmates _____ now?

—Yes. I like them _____. [ ]

A. very much; very much                  

B. very well; very much

C. very well; very well                    

D. very much; very well

绝对误差是具有大小、（）和量纲的数值。

A.单位

B.符号

C.范围

D.方向