单项选择题
A.0.5us/div~0.5s/div B.0.2us/div~0.2s/div C.0.5us/div~0.2s/div D.0.2us/div~0.5s/div
A.YA、YB、YA±YB、交替、断续 B.YA、YB、YA+YB、记忆、断续 C.YA、YB、YA+YB、交替、断续 D.YA、YB、YA+YB、交替、常态
A.绝对误差 B.相对误差 C.观测误差 D.测量误差