计量仪表的精度等级是根据（）来划分的，引用误差是（）与量程之比。
参考答案：引用误差；绝对误差
－Excuse me, madam. My flight is BA 6520. Is this my gate?
－ . Please show your ticket and ID card.
A．That’s right
B．All right
C．That’ all right
D．It’s all right.
电缆输电有何缺点？
