单项选择题
A.-1.00DS/+2.00DC×180B.+1.00DS/-0.50DC×90C.+3.00DS/+2.00DC×90D.-3.00DC×180/-1.00DC×90E.+3.00DC×180/+1.00DC×90
A.-1.00DS/-2.00DC×180B.+1.00DC×90C.-2.00DS/+2.00DC×90D.+3.00DC×180/-1.00DC×90E.-1.00DC×90
A.环曲面B.柱镜C.透镜D.球镜E.棱镜