在测距仪及全站仪的仪器说明书上的标称精度,常写成±(A+B*D),其中,B称为()。
A.固定误差
B.比例误差
C.固定误差系数
D.比例误差系数
参考答案:D
I ________ my hometown for a long time. I really miss it![ ]
A. left
B. went away from
C. have left
D. have been away from