分析国债规模需研究的问题有()。A.国债的发行 B.国债的利率 C.国债的负担 D.

阅读理解。

     Wherever travelers go, cameras are sure to follow. It's great fun to take photos, and even more fun to

 show slides of the trip to friends and relatives when they come back home.

    There's Aunt Sarah, smiling in front of Buckingham Palace; Aunt Sarah, smiling under the Eiffel Tower;

 and Aunt Sarah, smiling in a Venetian Canal. Everyone knows what Aunt Sarah looks like; they also

 know what Europe's great landmarks (显著地面景观) look like.

     But a young man named David, just back from a trip to Greece, asked a few friends over to see his

  slides. The young man had an artist's eye. His pictures were not of familiar Greek architectures. Instead

 he took pictures of farmers at work in the field, fishermen repairing their nets, and bearded priests (牧师)

  bending over their Bibles. He captured (抓住) the color and character of the country. His friends were

 so interested that they asked for more.

     Any amateur (外行) can do the same. All he needs is a simple camera and a little sensitivity. When he

 learns that a nation lives in its people as well as in its landmarks, he moves from an amateur to an artist.

1. What does the underlined word "slide" mean?

    A. 故事          

    B. 幻灯片              

    C. 风景          

    D. 路线

2. People who watch Aunt Sarah's slides would be _____.

    A. frightened      

    B. excited              

    C. bored          

    D. sad

3. David's pictures were about _____.

    A. landmarks      

    B. architectures          

    C. people        

    D. history

4. David is _____.

    A. foolish      

    B. the same as Aunt Sarah      

    C. strange        

    D. original (有创意的)

5. A traveler can become an artist if he _____.

    A. takes a camera with him                

    B. knows the history of a place

    C. is interested in not only the landmarks but also the people of a place

    D. learns how to draw and paint pictures of a place

关于瞬时速度、平均速度、平均速率，下列说法中正确的是（　　）

A．平均速度是质点在某段时间内运动的位移与所用时间的比值

B．瞬时速度是质点在某一位置或某一时刻的速度

C．平均速率就是平均速度的大小

D．做变速运动的质点，平均速度是通过的路程与所用时间的比值

若一次函数y=（2m-1）x+3-2m的图象经过 一、二、四象限，则m的取值范围是（    ）。

当油藏主要依靠边水、底水和注入水的侵入而将油气排出，这种驱动方式叫弹性驱动。

接发列车人员发现通过列车中有车辆抱闸，应向司机或运转车长显示停车信号，来不及时，应报告（），使列车在前方站停车处理。

A、前方值班员

B、列车调度员

C、列车司机

D、运转车长