A.13.688 B.16.312 C.16.401 D.17.713
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