阅读晏殊的《采桑子》完成小题。
                                                                                                                               采桑子  晏殊
                                                                                               时光只解催人老，不信多情，长恨离亭，泪滴春衫酒易醒。
                                                                                               梧桐昨夜西风急，淡月胧明，好梦频惊，何处高楼雁一声？

如图所示，R₁＝10Ω，R₂＝20Ω，R₃＝30Ω，接在电源上时，功率分别为P₁、P₂、P₃，则（         ）