题干

一种商品价格的涨跌,会带来该商品及其相关商品需求量的变化。结合图示,不考虑其他条件,下列说法符合下图的是(  )

   

A:直线ad可表示食盐价格变动与其需求量的关系

B:直线ab可表示黄金价格变动和其需求量的关系

C:直线bc可表示玉米价格变动和小麦需求量的关系

D:直线cd可表示汽油价格变动和汽油需求量的关系

上一题 下一题 0.0难度 选择题 更新时间:2018-05-19 05:02:48

答案(点此获取答案解析)

C

同类题1

完形填空

    Reading good books is one of the greatest pleasures in life. It 1 our happiness when we are cheerful, and lessens our 2 when we are sad. A good book may absorb our attention so 3 that for the time being we forget our 4.

    Whatever may be our main purpose in reading, good books should never fail to give us 5. With a good book in our hands we will never be 6. Whether the characters in the book are taken from real life or are purely 7, they may become our companions and make us laugh. The people we meet in books may 8 us either because they are similar to our close friends or because they present 9 types whom we are glad to welcome as new acquaintances. Our human friends sometimes 10 us, but the friends we make in books are always respect us. By turning the pages we can 11 them without any fear of hurting their feelings, When our human friends 12 us, good books are always there to give us sympathy and encouragement.

    One of the most valuable gifts from books is 13. Few of us can travel far from home.14 all of us can lead varied lives through the pages of book. When we wish to 15 from the dull realities of everyday life, a book will help us when 16 else can. To travel by book we don't have to 17 and save a lot of money. Through books we may gel the thrill of adventure without 18. We can climb high mountains or cross the hoi sands of the desert,19, through books the whole world is ours for the asking. The 20 of our literary experiences are almost unlimited.