正式登记续展有效期为（）。

影响投资报酬率的三个关键性因素（）、（）、（）。

Dear Zhou Lan,

Thank you very much for your mail. I want to go to China. I know something about China from your e-mail. Your English is very good. But I don’t know much Chinese. Now I’m learning it from my parents. They know much about China. They tell me many things about China.

I’m happy to know that you like your school and your family. Do you want to know my family and my school? I have a big family. My grandparents and my parents are all very fine. My father has a brother. He is my uncle, John. He and my aunt have their children. They’re Bill, Linda, Mary and Lily. My brother Dick is a boy of eighteen. I like my family very much. I’ll go to China next year with my mother. She is going to teach English in a middle school in Beijing.

Yours,

Annie

小题1:Who will come to China?

A．Annie

B．Annie’s family

C．Annie and her mother

D．Annie’s parents.小题2:Who teaches Annie Chinese?

A．Zhou Lan

B．Annie’s parents

C．Annie’s grandparents

D．Annie herself

堆石体的堆实压实质量指标通常用（）表示。

A.干密度 

B.比重 

C.孔隙率 

D.级配

2009年2月17日菲律宾国会通过“领海基线法案”，将中国的黄岩岛和南沙群岛部分岛礁划为菲律宾领土。中国政府对菲律宾政府不顾中方严重关切和多次交涉，执意通过侵犯中国主权的法案表示强烈不满和严正抗议。这一材料体现我国 ( )

①外交政策的基本立场 ②外交政策的基本目标 ③对外关系的基本准则 ④外交政策的宗旨

A．①②③

B．①③④

C．①②④

D．②③④

2003×20022002-2002×20022003＝( )

A．20020

B．200200

C．2002000

D．20020000