题目

  One of the most striking findings of a recent questionnaire in the UK is that of the people interviewed, one in two believes that it is becoming more difficult to meet someone to start a family with.   Why are many people finding it increasingly difficult to start and keep close relationships? Does modern life really make it harder to fall in love? Or are we making it harder for ourselves?   It is certainly the case today that nowadays couples benefit in different ways from relationships. Women no longer rely upon partners for economic security（安全性）or status. A man doesn如图所示，电源电压为6V，当开关S闭合时，电压表示数为2V，L1两端电压是______V。当开关S断开时，电压表的示数为_______V。