单项选择题

Which of the following is NOT TRUE according to the passage

A．Headsets shouldn't be used any more.
B．We should use headsets in a proper way.
C．Noise is dangerous to our hearing.
D．Damage caused by noise may not be found in the early years of life.

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单项选择题

According the experts, when headset sound reaches 110 decibcls, it can be used at most for ______. A) one hour C) two hours B) half an hour D) three hours

A．According the experts, when headset sound reaches 110 decibcls, it can be used at most for ______.
B．one hour
C．half an hour
D．two hours
E．three hours

单项选择题

The government is introducing new production management standards for the food industry.

A．政府正在为食品行业制定新的生产管理标准。
B．政府正在为食品行业介绍新的生产管理标准。
C．政府正在介绍食品行业的新的生产管理标准。
D．政府正在引进新的代表食品行业的生产管理标准。