[单项选择]In Disneyland, every year, some 800,000 plants are replaced because Disney refused to ______ signs asking his "guests" not to step on them.
A. put down
B. put out
C. put up
D. put off

[单项选择]In Disneyland, every year, some 800, 000 plants are replaced because Disney refused to ______ signs asking his "guests" not to step on them.
A. take down
B. call for
C. put up
D. set up

[单项选择]In Disneyland, every year, some 800,000 plants are replaced because Disney refused to ______ signs asking his "guests" not to step on them.
A. put down
B. put out
C. put up
D. put off

[单项选择]Every year some basketball or soccer players are______from one club to another.
A. transmitted
B. transferred
C. transported
D. transformed

[单项选择]

Every year television stations receive hundreds of complaints about the loudness of advertisements. However, federal rules forbid the practice of making ads louder than the programming. In addition, television stations always operate at the highest sound level allowed for reasons of efficiency. According to one NBC executive, no difference exists in the peak sound level of ads and programming. Given this information, why do commercials sound so loud
The sensation of sound involves a variety of factors in addition to its peak level. Advertisers are skilful at creating the impression of loudness through their expert use of such factors. One major contributor to the perceived loudness of commercials is that much less variation in sound level occurs during a commercial. In regular programming the intensity of sound varies over a large range. However, sound levels in commercials tend to stay at or near peak levels.
Other "tricks of the trade" are also used. B
A. TV stations always operate at the highest sound levels
B. their sound levels are kept around peak levels
C. their sound levels are kept in the middle frequency ranges
D. unlike regular programs their intensity of sound varies over a wide range