A、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">往返较差</span>
B、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px; TEXT-DECORATION: none">相对误差</span>
C、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">闭合差</span>
D、<span style="FONT-FAMILY: 宋体; FONT-SIZE: 14px">中误差</span>