单项选择题
A.±3,±3,±1 B.±3,±2,±1 C.±4,±2,±2 D.±4,±3,±2
A.3 B.5 C.7 D.11
A.±1.5,≤6 B.±1.5,≤5 C.±1.0,≤6 D.±1.0,≤5