55._________A. noiseB. soundC. musicD. bell

The PRIMARY function of a waste heat boiler is to _____.A.reduce engine exhaust noiseB.red

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回答（55）题 查看材料A.noiseB.sounDC.musiCD.bell

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All the following can damage hearing EXCEPT______.A．excessive noiseB．too much moderate noi

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While I _____ television, the door bell _____.A. watched／would ringB. would watch／h

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____________, they immediately left the house.A、Being heard the noiseB、Hearing the noise

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_______ had the bell rung _______ the students took their seats.A、No sooner;whenB、Hardly

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A．noiseB．soundC．musicD．bell

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