单项选择题
A.5nm B.10nm C.50nm或40nm D.0.5μm
A.10nm B.20nm C.50nm D.0.1μm
A.0.5% B.1% C.1.5% D.2%
A.±1nmB.±5nmC.±10nmD.±0.2μm
A.±1nm B.±5nm C.±10nm D.±0.2μm
A.280~380nm B.350~1800nm C.380~780nm D.4.5~25μm