土家族的先民与古代的（）有直接的渊源关系。 A.羌人 B.氐人 C.巴人 D.胡人

下面是18世纪80年代某西方大国确立的资产阶级代议制图示，该体制在资产阶级政治民主化方面所作的主要贡献是确立了

A．议会制原则

B．分权与制衡原则

C．总统制原则

D．政党政治原则

下列不属于超声波雾化器工作特点的是（）。

A.雾滴小而均匀

B.药液随呼吸可到达终末支气管及肺泡

C.雾化液温暖、舒适

D.雾量的大小可以调节

E.用氧量小，节约资源

方程x（x-3）=5（x-3）的解是（　　）

A．x=3

B．x=5

C．x₁=-3，x₂=5

D．x₁=5，x₂=3

如图所示，匀强磁场的磁感应强度为B，磁场中有正方形线框abcd，线框的总电阻为R，边长为L，每边质量为m磁场方向水平向右，开始时线框处于水平位置且bc边与磁场垂直，把线框由静止释放使它以bc为轴在t 秒内由水平位置转到竖直位置刚好停下来，则在该过程中

线框中产生的热量为             ，线框中产生的平均感应电动势为            。

     Long ago, poems were recited out loud instead of being written down. When the Greeks first started

the Olympics, they held poetry contests as well as athletic competitions.

     Now, poetry competitions have been revived (恢复). This year 120,000 high school students

competed in the first Poetry Out Loud National Recitation Contest, performing poems from memory

for $100,000 in prizes.

     The first competitions were held in classrooms. The winners went on to schoolwide contests, and

then they competed in city and state competitions. Finally, the 50 state champions, along with the District

of Columbia champion came to Washington, D. C. last week for the last showdown. After the 51

champions competed against one another,12 went on to the finals. Then the field was narrowed to five.

The final five had one last chance to "perform" a poem. The overall champ, Jackson Hille, a high school

senior from Ohio, won a $20,000 scholarship.

     The National Endowment for the Arts and the Poetry Foundation started Poetry Out Loud because

they realized that hearing a poem performed is a different experience from reading it on a page.

     It's not just a matter of saying the words in the right order. It's the tone of voice, the pauses, the

gestures, and the attitude of the person performing that bring the words to life. "Each time we hear

somebody recite a poem, we find something fresh and interesting about it, " says National Public Radio

Broadcaster Scott Simon, master of ceremonies for the finals. Hearing it in a new voice offers something

new to the listener.

     Not only do the people hearing poems have a new experience, memorizing and presenting poems

helps the participants (选手) understand those poems in a new way. Another benefit of a competition

such as Poetry Out Loud is that the participants learn publicspeaking skills that can help them for life.

1. From the first paragraph, we can know________.

A. the Greeks were the first to write poems

B. the Olympics used to start with poem reciting

C. poems were spread orally in the past

D. athletes were asked to recite poems before competing

2. How many rounds of competitions did the champions take before they went to Washington, D. C. ?

A. Three.  

B. Four  

C. Five.  

D. Six.

3. According to the passage, hearing a poem recited by different people can________.

A. bring a new life to listeners

B. help listeners find their interest

C. make listeners learn the words

D. offer something new to listeners

4. One benefit the participants get from poem recitation competitions is that they can________.

A. become skilled in speaking in public

B. write good poems themselves

C. change their attitudes towards life

D. make friends with many great poets

5. What's the main idea of the passage?

A. Reciting poems improves your memory.

B. Remembering a lot of poems is fun.

C. Poets have a great time.

D. Poetry competitions freshen us up.