用光学镜片矫正屈光不正的原理是:镜片焦度弥补了戴镜者的生理光学性缺陷,使戴镜后满足视觉光学上的共轭关系。()
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顾客佩戴渐进多焦点出现中距离、近距离单侧向模糊,原因是视轴水平向偏离渐变通道。()
AcampusinfrastructuresupportswirelessclientsviaCiscoAironetAGSeries1230,1240,and1250accesspoints.WithDNSandDHCPconfigured,the1230and1240accesspointsappeartobootandoperatenormally;however,the1250accesspointsdonotseemtooperatecorrectly.Whatisthemostlikelyissuecausingthisproblem?()
A. PoE
B. DHCPwithoption150
C. DHCPwithoption43
DNS
E. switchportdoesnotsupportgigabitspeeds
镜片染色的浓度不会影响到镜片对可见光的透光率。()