问题 填空题 案例分析题

目前市场上有许多水果、蔬菜是用植物激素刺激生长发育成熟的,人们担心儿童吃了这类水果、蔬菜后,会出现性早熟。中科院上海生理生态研究所赵教授介绍,大部分植物激素是植物自身合成的“内源性激素”。因其能调节植物的生长发育,人们便将其科学地提取出来,分析其结构,利用微生物发酵工业生产或化学合成,之后推广应用,如保花保果、延缓或促进果实成熟等。赵教授说:“激素水果不会引起儿童性早熟。”根据信息结合所学知识,请回答下列问题:

综上所述,从理论层次分析说明“激素水果”不会引起儿童性早熟的原因是:()

答案

参考答案:植物激素与人体性激素是不同物质,其结构不同,功能也不一样。

阅读理解

Linda Evans was my best friend-like the sister I never had, We did everything together:piano lessons, movies, swimming , horseback riding.

When I was 13, my family moved away, Linda and I kept in touch through letters, and we saw each other on special times- like my wedding and Linda’s. Soon we were busy with children and moving to new homes, and we wrote less often. One day a card that I sent came back, stamped “Address Unknown”. I had no idea about how to find Linda.

Over the years, I missed Linda very much, I wanted to share happiness of my children and then grandchildren, And I needed to share my sadness when my brother and then mother died, There was an empty place in my heart that only a friend like Linda could fill.

One day, I was reading a newspaper when I noticed a photo of a young woman who looked very much like Linda and whose last name was Wagman—Linda’s married name. “There must be thousands of Wagmans . ”I thought, but I still wrote to her.

She called as soon as she got my letter, “Mrs, Tobin!” she said excitedly, “Linda Evans Wagman is my mother.”Minutes later I heard a voice that I recognized at once, even after 40 years. We laughed and cried and caught up on each other’s lives, Now the empty place in my heart is filled, And there’s one thing that Linda and I know for sure: we won’t lose each other again!

小题1:The writer went to piano lessons with Linda Evans    .

A.at the age of 13

B.before she got married

C.before the writer’s family moved away

D.after they moved to new homes小题2:They didn’t often write to each other because they    .

A.got married

B.had little time to do so

C.didn’t like writing letters

D.could see each other on special times小题3:There was an empty place in the writer’s heart because she    .

A.was in trouble

B.didn’t know Linda’s address

C.received the card that she sent

D.didn’t have a friend like Linda小题4:The writer was happy when she    .

A.read the newspaper

B.heard Linda’s voice on the phone

C.met a young woman who looked a lot like Linda

D.wrote to the woman whose last name was Wangman小题5:They haven’t kept in touch    .

A.for about 40 years

B.for about 27 years

C.since they got married

D.since the writer’s family moved away

单项选择题 案例分析题