A.-170.919 B.170.919 C.104.302 D.-104.302
A.偶然誤差 B.系統(tǒng)誤差 C.偶然誤差也可能是系統(tǒng)誤差 D.既不是偶然誤差也不是系統(tǒng)誤差
A.1∶5000 B.1∶2000 C.1∶1000 D.1∶500