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英语翻译Noise quite clearly affects the health of modern man.It

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英语翻译
Noise quite clearly affects the health of modern man.It is a health threat.Loud noise (33) ______ (say) to be a leading cause of deafness among many people over 65.It is also a major (34) ______ (contribute) factor in causing stress,(35) ______ itself causes a variety of illnesses.
33.is said 34.contributing 35.which
英语翻译Noise quite clearly affects the health of modern man.It
噪音相当明显地影响到现代人的健康了,对健康造成威胁.噪音据说对65岁以上人群所造成的耳聋起主导因素.而且在社会生活中所产生的压力方面起决定性的因素,而压力自身也会导致各种疾病的蔓延
1 it is said to be /to have done据说的常规表达
2现在分词做定语,起形容词作用
3 非限制性定语从句,which关系代词,指代主句全句,或者主句中某词组,或者某词