渐进多焦点中连接远用、近用区的中央称为渐进区。()
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渐进多焦点所测量的棱镜度的数值应为近用加光度的2/3。()
Anetworkisdeployedusingbestpracticesoftheenterprisecampusnetworkmodel,includinguserswithdesktopcomputersconnectedviaIPphones.GiventhatallcomponentsareQoS-capable,wherearethetwooptimallocationsfortrustboundariestobeconfiguredbythenetworkadministrator?()
A. host
B. IPphone
C. accesslayerswitch
D. distributionlayerswitch
E. corelayerswitch
变色镜片在光照度不变的情况下,温度越低变色越深。()