南京地铁的企业愿景是：（）。

阅读理解。

     I've 1ived my mother's desk since I was just tall enough to see above the top of it as mother sat doing

letters.Standing by the chair, looking at the ink, bottle, pen and white paper, I decided that the act of writing

must be the 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 anger, never saw her cry. I knew she loved me: she showed

it in action. But I still remember when I was a young girl, I wanted heart-to-heart talks between mother and

daughter.They never happened. I was "too emotional", but Mother only lived "on the surface". And a gulf

appeared between us. I couldn't understand her.

     As years passed, I had my own family. I got to know her love, and I wrote to her in careful words and

asked her to let me know in any way she chose that she did forgive me. I posted the letter and waited for her

answer. None came. I became disappointed. I Couldn't be sure that the letter had even got to mother. It

seemed nothing had happened.

     Now the present of her desk told me why she had never been able to answer me.I cleaned the desk

carefully and found some papers inside-a photo 0f my father and a one-page letter, folded and refolded many

times. It was just my letter!

     Mother, you always chose the act that speaks other than words.

1.The writer began to love her mother's desk ______. [ ]

A.after mother died

B.after she became a writer

C.when she was a child

D.when mother gave it to her

2.The pas sage shows that ______. [ ]

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

B.Mother was very angry with her daughter in words

C.Mother cared much about her daughter in words

D.Mother wrote to her daughter in careful words

3.The word "gulf" in the second paragraph means ______. [ ]

A.礼物

B.鸿沟

C.建议

4.What did the mother do with her daughter's letter? [ ]

A.She had never received the 1etter.

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

C.She didn't forgive her daughter at all in her 1ife.

D.She read the letter again and again till she died.

5.What's the best title of the passage?[ ]

A.A Letter to Mother.

B.Mother and Daugher

C.Daughter's life

D.Mother's life

组成蛋白质的基本单位是

A．D、L-α-氨基酸

B．D-α-氨基酸

C．D-β-氨基酸

D．L-α-氨基酸

E．L-β-氨基酸

冬季施工的混凝土同条件试块，一般情况应到下一年春天再标准养护28d后试压。 ( )

读珠江三角洲地区图，完成下列各题。

（1）写出图中字母代表的特别行政区名称（写全称）：

    A________________________ ， B_________________________ 。

（2）写出图中数码代表的城市名称： ①_________ ， ②__________ ， ③_________ 。

（3）特别行政区A由_________ 半岛和附近的___________ 、___________ 组成，市区内环境幽雅，素

    有“_______________ ”之称。

（4）特别行政区B是著名的贸易港，其主导产业是_____________ 。此外旅游业也很发达，被为“_____

    ______________”。

广泛应用的MRP系统实质上属于（）控制类型。

A.推进型控制

B.负馈控制

C.拉动型控制

D.前反馈控制方式