题目

地球的年龄约为亿年，地球是由原始的坍缩、凝聚而形成的。地球在形成之初是一个由构成的炽热的球。随着地球温度的不断下降，固态的逐渐形成。由高温岩浆不断喷发而释放的、等构成了非常稀薄的原始大气。高温岩浆不断喷发而释放的大量，随着温度的下降，凝结成水滴降到地表，汇流成。 答案：【1】46【2】太阳星云【3】岩浆【4】地壳【5】水蒸气【6】二氧化碳【7】水蒸气【8】海洋 For a song to become popular, people need to hear it. In order for people to hear it, the program directors at radio stations have to play it on the air. A song’s popularity is directly related to how often it is played. That is a big responsibility for program directors. How do they decide what gets played and what doesn’t?        In the past, disc jockeys(音乐节目支持人) decided what music was played on the radio. These DJs had an ear for music and an understanding of what their audience wanted to hear. Today, that is all changing. Most major radio stations are owned by a few large national businesses. The decision of what gets played on the radio is made by executives(主管) who have little or no interest in music. They do, however, know how to run a business, and they know what sells. So, the music industry designs and creates pop entertainers, and executives in the radio industry make sure that their music is played on the radio. This explains why you do not often hear anything new and fresh on the radio. The executives do not want to give air time to music that has not been tested on the market. It is too risky. They prefer to go with music that they already know will sell. They know it will sell because it sold last week and last month and last year. They just have to change it a little.        One of the most criticized(批评)practices in the music industry is the practice of “payola”. This is when record companies pay radio stations to play the music of a given artist. This practice makes many people lose trust in the music industry and is therefore against the law. A radio station can accept money in exchange for air time of a song, but they have to make clear that the song is being played because its air time was paid for. They cannot present the song as if it were part of the normal play schedule.        Payola affects both artists and audiences. The artists who work with small record companies that cannot pay a lot of money to radio stations have a much harder time getting exposure. It creates an unfair playing field. Music lovers suffer because they are not able to hear all the music that is available. 67. According to the passage, most major radio stations belong to _______.        A. national businesses    B. program directors     C. pop entertainers        D. record companies 68. “Payola” is the practice of ________.        A. artists paying radio stations to play their songs        B. record companies buying air time for certain music        C. radio station paying record company for new songs        D. program directors deciding what music gets played 69. Who can make the largest profits from payola?        A. Disc Jockeys.    B. The given artists.      C. Business executives.      D. Program directors. 70. It can be concluded from the passage that the author _______.        A. has a positive attitude towards the practice of “payola”        B. is dissatisfied with the present situation in music industry        C. is calling for a change in the normal play schedule        D. thinks that the radio stations are doing the right thing