POF的精选

1、ExperimentalResearchonPMMAPOFunderIrradiation2、Anovelplasticopticalfiber(POF)powercouplerisproposed,whichisdifferentfromfusedtapertypeandmixingrodPOFcouplers.3、Unlikemenopause,itispossibleforPOFt...

问题详情： O为坐标原点,F为抛物线C:y2=4x的焦点,P为C上一点,若|PF|=4,则△POF的面积为()(A)2  (B)2    (C)2        (D)4【回答】C知识点：函数的应用题型：选择题...

问题详情：O为坐标原点，F为抛物线C：y2＝4x的焦点，P为C上一点，若|PF|＝4，则△POF的面积为()A．2                                                           B．2 C．2...