题目

正常情况下，下列四个图若改变自变量或因变量，则曲线变化最大的是 A . 图①将“光照强度”改为“CO2浓度” B . 图②将“胰岛素相对含量”改为“胰高血糖素相对含量” C . 图③将“有丝分裂各时期”改为“减数第二次分裂各时期” D . 图④将“酶活性”改为有氧呼吸释放CO2量” 答案：BAll over my garden I’ve planted nothing but roses, because I especially love the flower．A close friend came for a visit the other day．I told her that she should pick a bunch of roses to beautify her bedroom．I promised that the smell of the roses would be wafted far, far away． That girl friend of nine, walking into the garden in high spirits, smelt here and there, but in the end she didn’t pick a single rose．I said that she could pick many flowers; I told her that I was not a flower farmer and didn’t make a living out of them．Saying so, I raised the scissors for the sacrifice of the flowers, but she stopped me, crying no, no, no! To cut such beautiful roses would hurt one, she said．With her hands seizing at my sleeves, she told me that by no means should they be cut．Roses are the smiling face of the earth, and who could be so iron-hearted as to destroy such a charming smile? My mind was shocked: the ugly earth, the tough earth, the plain earth-it is for the reason of that smile that it wins the care and pity of people． 1．The writer plants nothing but roses in her garden probably because       .        A．she can make money out of them          B．her friends like them        C．she enjoys the roses very much             D．the roses sell well 2．The underlined word “wafted” in Paragraph 1 is closest in meaning to “       ”.        A．given off             B．lost                     C．destroyed            D．thrown away 3．Why did the writer’s close friend refuse to pick a single rose?        A．Because the roses were not beautiful.        B．Because she loved the roses very much.        C．Because she did not like this kind of roses.        D．Because the writer did not want to give her any. 4．What is the best title for the passage?        A．The Pity of People to the Roses        B．The Smiling Face of the Earth        C．A Lovely Rose Garden        D．A Lover of Flowers