男性，70岁，糖尿病10年，以往无心悸，胸痛史，今日早餐后1小时，突然胸闷明显，面色

撕取紫色万年青的叶表皮，剪成大小相等的小块，分别浸入不同浓度的硝酸钾溶液中。经过一段时间后，用显微镜观察实验的结果如下表：请回答：

(1)万年青叶表皮细胞的细胞液浓度约为__________。

(2)用硝酸钾溶液诱发细胞质壁分离的基本条件是__________。

(3)C和D处理均发生质壁分离的自动复原，你对这种现象作出合理的解释是_________。

(4)用高浓度硝酸钾溶液诱发细胞质壁分离，不能再诱发其复原，其主要原因是________。

(5)如图A、B、C表示同一细胞处于不同浓度蔗糖溶液中，则A图与B图细胞所处的外界溶液浓度是________>_________。

(6)假设将紫色万年青的叶表皮制成装片并使之处于高渗溶液中而发生质壁分离，用显微镜观察一个细胞的质壁分离发展过程,发现该细胞形态的变化顺序将如上图所示的从________→_________→_________。(7)如图A、B、C表示同一细胞处于不同浓度蔗糖溶液中，此时各细胞抵抗失水的能力，依次是________>________>________。

(8)图中标号①指的物质是__________。

(9)在实验中，怎样操作才能使盖玻片下的A细胞状态变为B细胞状态？_________。

打底盖前，要先检查底盖不可有（）、批锋、变形等.

合同当事人一方在不改变合同内容的前提下将其全部的合同权利义务一并转让给第三人被称为( )。

A．合同变更

B．合同的权利转让

C．合同的义务转

D．合同权利义务的概括转让

关于项目管理工作任务分工表特点的说法，正确的是()。

A.每一个部门只能有一个主办部门 

B.每一个任务只能有一个协力部门和一个配合部门 

C.项目运营部应在项目竣工后介入工作 

D.项目管理工作任务分工表应作为组织设计文件的一部分

B

I’ve loved my mother’s desk since I was just tall enough to sit above the top of it. Mother sat writing letters. Standing by her chair, looking at the ink bottle, pens, and white paper, I decided that the act of writing must be a most wonderful thing in the world.

Years later, during her final illness, Mother kept different things for my sister and brother. “But the desk,” she said again, “is for Elizabeth.”

I never saw her angry, never saw her cry. I knew she loved me; she showed in action. But as a young girl. I wanted to have heart-to-heart talks between mother and daughter.

They never happened. And a gulf opened between us. I was “too emotional (易动感情的)”. But she lived “on the surface (表面)”.

As years passed and I had my own family. I loved my mother and thanked her for our happy family. I wrote to her in careful words and asked her to let me know in any way she chose that she did forgive me.

My hope turned to disappointment, then little interest and, finally, peace – it seemed that nothing happened. I couldn’t be sure that the letter had even got to Mother. I only knew that I had written it, and I could stop trying to make her into someone she was not.

But the present of her desk told me, as she’d never been able to, that she was pleased that writing was my chosen work. I cleaned the desk carefully and found some papers inside – a photo of my father and a one-paper letter, folded and refolded many times. It was my letter.

“In any way you choose, Mother, you always chose the act that speaks louder than words.”

小题1:The writer began to love her mother’s desk________.

A．after Mother died

B．after she wrote the letter

C．when she was a child

D．when Mother gave it to her小题2:The passage shows that_________.

A．Mother was cold on the surface but kind in her heart to her daughter

B．Mother was too serious about her daughter in words

C．Mother wrote to her daughter in careful words

D．Mother wrote to her daughter in careless words小题3:Which of the following is NOT true?

A．The author may work as a writer

B．The author and her mother love each other, but didn’t say it out

C．Neither the author nor her mother had a happy family.

D．The author’s mother is a person who prefers act to words.小题4:What did Mother do with her daughter’s letter asking for forgiveness?

A．She had never received the letter.

B．For years, she often talked about the letter.

C．She didn’t forgive her daughter at all in all her life.

D．She read the letter again and again till she died.小题5:What’s best title of the passage?

A．My letter to Mother

B．Mother and children

C．My Mother’s Desk

D．Talks between Mother and me