题目

下列分子中，与构成生物体的蛋白质的氨基酸分子式不相符的是（ ）A. B. C. D. 答案：【答案】B【解析】试题氨基酸是蛋白质的基本单位，其结构通式为，氨基和羧基连接在同一个碳原子上。B选项的氨基和羧基没有连接在同一个碳原子上，与氨基酸通式不符。故答案选B。7、Directions:    Read the following text and choose the most suitable heading from A-F for each paragraph. There is one extra heading which you do not need. 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 80． 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 latent and the talents of other students in our school. 81． 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. 82． Around the would 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’s on the radio. 83． 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. 84． 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.