The word "acoustic" in the last paragraph has something to do with
A.performance.
B.sound.
C.audience.
D.weather.
第1题
A.make sound rich and full.
B.be cures for sound problems.
C.be sources of sound problems.
D.function as effectively as clouds.
第2题
A.get rid of all reflections.
B.not have absorbers.
C.achieve a pleasing mixture of sound.
D.have smooth surfaces.
第3题
A.a short reverberation time.
B.an intermediate reverberation time.
C.no reverberation time.
D.a long reverberation time.
第4题
A.sound waves and their effects.
B.the types of music orchestras play.
C.walls of an auditorium.
D.the design of an auditorium.
第9题
? levels of tropical forests
A.reason
B.cause
C.level
D.effect
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