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【单选题】
三条棱边相等、三个夹角都等于90o的晶系是( )A.
正交
B.
四方
C.
立方
D.
三方
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反馈参考答案：
举一反三
【单选题】The difference between the cost and selling price is usually the__________．
A.
advantage
B.
benefit
C.
privilege
D.
profit
【单选题】To _________ their new shampoo, they are selling it at half price for a month
A.
progress
B.
proceed
C.
promote
D.
propose
【多选题】Net realisable value is the selling price less _____ and _____.
A.
All costs to completion
B.
Book value
C.
selling costs
D.
Depreciation
【单选题】To ______ their new product, they are selling it at half price for a month.
A.
raise
B.
improve
C.
promote
D.
increase
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