Afraid of getting lost,the little girl __________the tail of her father's coat.    [ ]

A. caught up with              

B. held on to    

C. got close to                    

D. got in touch with

测量误差的表达形式一般有（）。

A、绝对误差，相对误差，示值误差，引用误差

B、理论误差，仪器误差，环境误差，人为误差

C、绝对误差，相对误差，理论误差，人为误差

D、绝对误差，人为误差，引用误差，仪器误差