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【单选题】
如果两种商品是互补关系,则一种商品的需求量与另一种商品的价格之间是A.
反向变动关系
B.
同方向变动关系
C.
没有关系
D.
难以确定
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举一反三
【简答题】读“西亚地区图”，回答： （1）西亚为什么被称为“五海三洲之地”？ （2）西亚为什么被称为“世界石油宝库”？ （3）有人说在西亚有些国家“水比油贵”，你同意这个观点吗？说说你的理由。
【判断题】Gemology and Gemstone Instruction Gemology is the study of gemstones, which includes gem properties, locations and origins. Gemology is often studied by people in the jewelry business, including busin...
A.
正确
B.
错误
【简答题】Translate the following sentences into Chinese or English. 1. Gemology is often studied by people in the jewelry business, including business owners, buyers, designers and appraisers.
【简答题】()被称之为世界石油宝库
【简答题】读“西亚地区图”，回答： （1）西亚为什么被称为“五海三洲之地”？ （2）西亚为什么被称为“世界石油宝库”？ （3）有人说在西亚有些国家“水比油贵”，你同意这个观点吗？说说你的理由．
【判断题】Gemology and Gemstone Instruction Gemology is the study of gemstones, which includes gem properties, locations and origins. Gemology is often studied by people in the jewelry business, including busin...
A.
正确
B.
错误
【判断题】Gemology and Gemstone Instruction Gemology is the study of gemstones, which includes gem properties, locations and origins. Gemology is often studied by people in the jewelry business, including busin...
A.
正确
B.
错误
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