长时间处于噪音的环境对人的听力有害,正常的环境分贝是()
A、60分贝到65分贝
B、70分贝到75分贝
C、80分贝到85分贝
D、50分贝到55分贝
参考答案:D
TBA/22电柜内有多少个变频器?
Admiral Cervera knew he was being ordered to certain destruction but felt compelled to obey. He chose the morning of July 3 for a gallant escape attempt.
A. daring B. futile C. critical D. fruitful