水平对比法的应用步骤包括： ①确定对比的对象； ②收集数据； ③实施改进；

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     When I was in the third grade, I was picked to be the princess in the school play. For weeks my

mother had helped me practice my lines. But once on stage, every word disappeared from my head.

Then my teacher told me she had written a narrator's part for the play, and asked me to change roles.

Though I didn't tell my mother what had happened that day, she sensed my unhappiness and asked if

I wanted to take a walk in the yard. It was a lovely spring day. We could see dandelions(蒲公英)

popping through the grass in bunches, as if a painter had touched our landscape with bits of gold. I

watched my mother carelessly bend down by one of the bunches. "I think I am going to dig up all

these weeds," she said. "From now on, we'll have only roses in this garden." "But I like dandelions," I

protested. "All flowers are beautiful-even dandelions!" My mother looked at me seriously. "Yes, every

flower gives pleasure in its own way, doesn't it?" she asked thoughtfully. I nodded. "And that is true of

people, too," she added. When I realized that she had guessed my pain, I started to cry and told her

the fact. "But you will be a beautiful narrator," she said, reminding me of how much I loved to read

stories aloud to her. Over the next few weeks, with her continuous encouragement, I learned to take

pride in the role. The big day finally came. A few minutes before the play, my teacher came over to

me. "Your mother asked me to give this to you," she said, handing me a dandelion. After the play, I

took home the flower, laughing that I was perhaps the only person who would keep such a weed.                                                                        

1. The girl did not play the role of the princess mainly because_____  

A. she felt nervous on the stage.

B. she lost her interest in that role.

C. she preferred the role of the narrator

D. she had difficulty memorizing her words                                      

2.Why did the mother suggest a walk in the garden?

A. To remove the dandelions              

B. To enjoy the garden scene                                                          

C. to help her daughter with the play.      

D. to have a talk with her daughter.    

3. What is the main idea of the story?                                              

A. Everybody can find his or her own way to success.

B. Everybody should learn to play different roles                                          

C. Everybody has his or her own value in the world.

D. Everybody has some unforgettable memory.

以下提供若干组考题，每组考题共用在考题前列出的A、B、C、D、E五个备选答案。请从中选择一个与问题关系最密切的答案。某个备选答案可能被选择一次、多次或不被选择。

催化DNA中相邻的5’磷酸基和3’羟基形成磷酸二酯键的酶是

A．反转录酶
B．端粒酶
C．末端转移酶
D．甲基转移酶
E．连接酶

我国在探索建设社会主义道路中的一次严重失误是 [ ]

A、社会主义总路线的提出

B、社会主义三大改造的完成

C、大跃进和人民公社化运动

D、第一个五年计划

孙某系某私营企业老板。2004年7月6日早晨6点20分对招手停下来的出租车司机赵某说："我欲去某宾馆签约，必须8点半以前赶到，否则我将损失10万元"。司机赵某说："时间没问题，你放心吧!"后因绕道加油耽误了时间又遇上班高峰期堵车，上午9点钟才将孙某送到指定地点。孙某签约未成而向赵某起诉要求赔偿10万元。经查，赵某为个体司机，孙某签约不成，造成利润损失10万元属实。本案中下列表述正确的是()。

A．孙某的10万元损失是直接损失，赵某应赔偿

B．孙某的10万元损失是预期的间接损失，赵某应赔偿

C．赵某应按其过错的程度分担孙某的10万元损失

D．赵某因自己的过错造成对方损失，应退还乘车费，但不承担赔偿责任

下列哪项不是Homer综合征的特征( )

A．眼睑下垂
B．瞳孔缩小
C．眼球内陷
D．同侧额部与胸壁无汗或少汗
E．结膜充血