设有图书管理数据库： 图书(总编号C(6)，分类号C(8)，书名C(16)，作者C

阅读理解。

Dear John,

     I get your letter from my teacher. I'm happy to know you.

     My name is Jack. I am fifteen. I live in Beijing.I am a student of No. 1 Middle School. I'm in Class 3.

My teacher is Miss Lee. She is not only(不仅) our English teacher but also(而且) our class teacher.

     At school I have two good friends. They are Susan and Sally. They are twins. They come from Britain.

They like China very much.They teach me English and I teach them Chinese.

     Let's be good friends. Please write soon.

                                                                                                                                                Yours

                                                                                                                                                  Jack 

1. This letter is from ______.    

A. John              

B. Jack              

C. Twins

2. Jack is ______.    

A. thirteen            

B. fourteen          

C. fifteen

3. Jack studies in ______.

A. Shanghai            

B. Beijing          

C. London

4. ______ is his English teacher.

A. Miss Lee          

B. Sally              

C. Susan

5. Susan and Sally are ______.

A. Jack's friends        

B. John's friends      

C. friends

脊髓压迫症最常见的病因是（）

A.脊柱外伤

B.炎症

C.神经鞘膜瘤

D.脊柱退行性病变

E.转移瘤

CIN的标记物是（）

A.P16

B.Ki67

C.P53

D.CK

E.PCNA

甲集团是国内大型粮油集团公司，近年来致力于从田问到餐桌的产业链建设，2008年收购了以非油炸方式生产“健康”牌方便面的乙公司，并全面更换了乙公司的管理团队。2009年“健康”牌方便面市场份额下降，为了从竞争激烈的方便面市场上重新赢得原有市场份额，2010年初需要制定方便面竞争战略。该竞争战略属于（）。

A.公司层战略

B.业务单位战略

C.产品战略

D.职能战略

测绘应当使用国家规定的测绘基准和测绘标准。