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【简答题】
下表是我国通信公司1997年的经营业绩状况表,利用指数法给出各个公司的经营业绩排名。(提示,选择所给的三个指标,指数采用它们与总体平均效的对比,权数可以选择各占三分之一。) 1997 年通信公司经营业绩
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【简答题】A．How to cover the cost of their legal fees. B．How to pr Nikki's sisters from using websites. C．How to pr the remaining photos on the Web from spreading. D．How to pr this from happening...
【单选题】The main purpose of the passage is to______.
A.
offer advice on how to prevent hip fractures
B.
emphasize the importance of health precautions
C.
discuss the seriousness of hip fractures
D.
identify the causes of hip fractures
【单选题】The purpose of this passage is ______.
A.
to give advice as to how to prevent hearing loss
B.
to define the effects of noise on human behavior
C.
to warn people of the danger of noise pollution
D.
to tell the difference between noise and sound
【单选题】What does the author tell us in this passage?
A.
How trees help prevent droughts and floods.
B.
The relationship between trees and man.
C.
How an empire fell to pieces in ancient times.
D.
A story of trees.
【单选题】《食品安全法》第五十条规定，食品生产企业应当建立食品原料、食品添加剂、食品相关产品进货查验记录制度，查验记录应当真实，保存期限不得少于产品保质期满后()。
A.
6个月
B.
12个月
C.
18个月
D.
24个月
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