如图所示，电路两端的电压U保持不变，电阻R₁、 R₂、R₃消耗的电功率一样大，则电阻之比R₁∶R₂∶R₃是(  )

墨墨在如图所示的△ABC的基础上作图，步骤如下：①分别以点A和点B为圆心，以a（a＞$\frac{1}{2}$AB）为半径，在边AB的两侧画弧，分别相交于点E，F；②连接EF；③分别以点B和点C为圆心，以b（b＞$\frac{1}{2}$BC）为半径，在边BC的两侧画弧，分别相交于点M，N；④连接MN，直线EF与直线MN相交于点O；⑤连接AO，BO，CO．下列说法中正确的是（　　）

The Value of a Dollar

    When I was nineteen, I had a job at a local bookstore. One night, a young couple came in and walked here and there looking for a book. They seemed ____ (be) the usual type to give mall ____ (worker) a hard time. When they went to pay ____ the book, the girl was a dollar or two short of ____ (buy) the book she wanted.

    She looked disappointed. I had a customer discount card and it was still active. I told the girl ____ (gentle), "Hang on, don't worry, you'll have the money to buy the book." I typed my password.

    She gave me a ____ (thank) smile. With a dollar left, she and her boyfriend left the store. I believed that I would never see ____ (they) again.

    I don't remember how long it was. ____ they did return later that evening just to bring me ____ beautiful card that said "It's people like you who make the world a better place to live in."

    I ____ (move) by the little girl and her boyfriend. In fact, they have also made the world a little brighter.