问题 阅读理解
Match.
A. Do established musicians have a responsibility to guide and assist young up-and-coming musicians?
B. Did anyone promote your musical education when you were growing up?
C. What kind of "world music" do you enjoy?
D. What's your comment on pop music?
E. Does the contemporary music press give jazz the coverage it deserves?
F. What's wrong with the music on the radio?
                                An interview with Wynton Marsalis, a noted jazz musician
1_____
     There were the older jazz musicians who hung around our house when I was young. I saw how much
they practiced, how serious they were about their art. I knew then I had to work just as hard if I wanted
to succeed. Of course, my father inspired me a lot, and many teachers took the time to nurture my talent
and the talents of other students in our school.
2_____
     Yes. We've done such a poor job with music education because, as a society, we haven't maintained the
kind of education that a true artist and musician needs. Young people haven't been able to equate romance
and talent with music. For instance, most of the people who make it in the music industry today have to
look good. How they sound is secondary. Sarah Vaughan, Bessie Smith, Ella Fitzgerald-those big, romantic
queens of jazz music wouldn't make it in today's music industry, and that's a shame. We need to teach young
people about the alternatives.
3_____
     Around the world people make music that, if you listen carefully to it, sounds a little like the cadence of
their language. I'd call it folk music. When I'm away from home, I make a point of listening to regional folk
music, not what' on the radio.
4_____
     The same music is on the radio all over the world, and the American sound is overwhelming. Even the
pop music that's produced and created in foreign countries has that American beat, that underscore of funk.
As a musician, I'm not interested in hearing recycled versions of the same genre over and over. Any music
that doesn't have a development section just isn't interesting to me.
5_____
     The music press has so much to introduce these days, and jazz is just a small fraction of it. Because some
people are intimidated by jazz, they don't cover it unless it's a big name. New jazz musicians don't get much
of break. A lot of editors don't say anything about jazz these days unless it's Marsalis. That's a shame. What
VH1 is doing with their Save the Music campaign is phenomenal. They're getting all these instruments out
to needy kids. It's the kind of thing all networks should be doing.
答案

1-5: B A C F E

实验题

Ⅰ.某化学实验小组探究市售食用白醋中醋酸的准确浓度,取25.00mL某品牌食用白醋于烧杯中,稀释并转移至250mL容量瓶中,定容,摇匀。取稀释液25.00mL用浓度为cb mol/L的标准NaOH溶液对其进行滴定。

(1)该小组用酚酞试液作指示剂,判断到达滴定终点的实验现象是:                                            

(2)右图表示50mL滴定管中液面的位置,若A与C刻度间相差l mL,A处的刻度为25,滴定管中液面读数应为        mL。

(3)为了减小实验误差,该同学一共进行了三次实验,假设每次所取白醋体积均为25.00mL,NaOH标准液浓度为cb mo1/L,三次实验结果记录如下: 

实验次数第一次第二次第三次
消耗NaOH溶液体积/mL26.3225.3425.30
从上表可以看出,第一次实验中记录消耗NaOH溶液的体积明显多于后两次,其原因可能是        

A.滴定前滴定管尖嘴有气泡,滴定结束无气泡

B.盛装标准液的滴定管装液前用蒸馏水洗后,未用标准液润洗

C.第一次滴定用的锥形瓶用白醋润洗

D.该NaOH标准液保存时间过长,有部分变质,浓度降低(4)根据所给数据,写出计算该白醋中醋酸的物质的量浓度的表达式(不必化简):

c=                 

Ⅱ. 用中和滴定法测定NaOH和Na2CO3混合溶液中的NaOH的质量分数时,可先在混合溶液中加入过量的BaCl2溶液,使Na2CO3完全变成BaCO3沉淀,然后用标准盐酸滴定(用酚酞做为指示剂)。试回答:

(1)向混有BaCO3沉淀的NaOH溶液里滴加盐酸,为什么不会使BaCO3溶解而能测定NaOH溶液的质量分数?

                                                                            

(2)分析在滴定过程中不断振荡锥形瓶的原因?

                                                                    

(3)滴定终点时溶液颜色如何变化?

                                                                    

(4)能否改用甲基橙作指示剂?并说明理由。

                                                                   

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