计算题:若消费者张某的收入为270元,他在商品X和Y的无差异曲线上的斜率为dY/dX

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问题:

计算题:若消费者张某的收入为270元,他在商品X和Y的无差异曲线上的斜率为dY/dX=-20/Y的点上实现均衡。已知商品X和商品Y的价格分别为PX=2,PY=5,那么此时张某将消费X和Y各多少?

考点:经济学消费者行为理论消费者行为理论题库
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I live in Albuquerque, New Mexico. I used to give a lot of money to the homeless, feeling  31  for them. But as time passed, I became a mom with no home, a huge 32    , and hardly any income. As a result, I  33 giving money to the people on the side of the road and became very  34 .
Things started to change for me  35 . I had a home, a backyard for my daughter, and plenty of food, and I started to  36 myself out of debt. One day we saw a homeless person with the  37 , “Will work for food.” I  38 . My daughter commented. “Mommy, you used to always give money to those people in  39 .” I replied, “Honey, they just use that money for  40 , or other bad things.” She didn’t respond.  41 when I said that, I didn’t feel right.
Three days later, I was driving to  42 my daughter from school. A man was standing on the corner, and something deep  43 me said, “Just help the guy.” So I  44 down my window, and he ran over excitedly. He said, “God bless you, I only need 77 cents.” I  45 into my ashtray (烟灰缸) and strangely enough, there  46 three quarters and two pennies.
I picked them up and gave them to him. He  47 with joy and tears in his eyes. “Wow, you just made it  48 for me to see my mom for Christmas! Thank you so much; the  49 that had this great sale is leaving in 20 minutes!” It was a moment I’ll  50 forever. I think that man won’t forget it either, but I was the one who got the best gift in life—GIVING.
小题1:
A.angry B.gratefulC.sorryD.strange
小题2:
A.problemB.burdenC.diseaseD.debt
小题3:
A.continued B.stoppedC.hatedD.appreciated
小题4:
A.rich B.bitterC.relaxedD.pleased
小题5:
A.slowlyB.immediatelyC.quicklyD.greatly
小题6:
A.save B.pullC.runD.feed
小题7:
A.determination B.signC.childD.advertisement
小题8:
A.ran away B.turned backC.passed by D.sped up
小题9:
A.dangerB.loveC.needD.sadness
小题10:
A.life B.bookC.foodD.smoking
小题11:
A.And B.SoC.ButD.Even
小题12:
A.bring up B.carry outC.pick upD.take out
小题13:
A.on B.insideC.behindD.over
小题14:
A.rolled B.pushedC.blewD.took
小题15:
A.reached B.wentC.knockedD.shouted
小题16:
A.hid B.stoodC.satD.slept
小题17:
A.burst outB.turned upC.set outD.stood up
小题18:
A.wonderfulB.meaningfulC.possibleD.interesting
小题19:
A.planeB.manC.woman D.bus
小题20:
A.thankB.remember C.respectD.hold
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