Text D
　
Rock music has grown in including hundreds of musical styles, some of which define a broad mainstream, while others are supported by small but devoted audiences. As in earlier decades, major record companies have used independent labels to find new trends and locate promising talent.

Rap music continued to develop in the 1990s, stimulating controversy over its sometimes violent lyrics. Many rap styles gained popularity, including the gangsta (gangster) style of Ice-T and Dr. Dre; the pop-rap style of hip-hop and jazz developed by Us3. Heavy metal has remained popular, as evidenced by huge arena concerts. A style known as alternative rock, popularized in the late 1980s by the group R. E. M., combines heavy-metal guitars, folk and punk influences, and ambiguous lyrics. The alternative style consisted of a number of substyles, such as the grunge rock of Seattle-based groups Nirvana and Soundgarden. Techno, a style of dance music that gained popularity in the 1990s, combines computer-generated, disco-like rhythms with digital samples. 
Acid jazz is a related style, combining rock and jazz influences.
Music video has remained an important means of introducing new performers. Other new media technologies, including the use of fiber-optic cables and satellite transmissions, have changed the way people access popular music. Advances in recording-studio technology, digital recording equipment, and synthesis techniques have allowed musicians, producers, and music engineers to exert far greater control over their final product than previously possible. In live concerts, miniaturized and relatively portable amplification equipment has been introduced to create the illusion of direct communication between the audience and the performers. In contrast, the Lo-Fi movement developed in 1990s as a reaction against the glossy production values of mainstream popular music. This movement stresses primitive, low-fidelity recording techniques that reflect those used in the 50s and 70s.

78. The following statements about music are true EXCEPT _____.
A. There are now hundreds of musical styles included in rock music.
B. Most rock styles are supported by a large number of devoted people.
C. Some rock styles are called mainstream style because of their popularity.
D. Different rock styles are labeled differently by major record companies.
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79. There are some discussions or arguments about rap music because _____.
A. it was not so popular in the 1980s as in the 1990s.
B. there are so many kinds of rap music available.
C. it combines with many other musical styles.
D. sometimes its lyrics are related to violence.
正确答案是
　
80. What brings about an improvement of sound quality in music industry?
A. Advances in studio technology, digital recording equipment and synthesis techniques.
B. New media technologies, as the use of fiber-optic cables and satellite transmissions.
C. miniaturized and relatively portable amplification equipment used in live concert.
D. Music video technologies that introduce new performers quickly, easily and artistically.
正确答案是