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【简答题】
一个等腰三角形的腰长4厘米,底边3厘米,它的周长是( )厘米。
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举一反三
【简答题】若等差数列 的前 项和为 ，若 ，则 _________．
【简答题】若等差数列 满足 ， ，则公差 ______； ______．
【单选题】--- What is the benefit of the wholesale channel? ---________
A.
There are two types of wholesalers like manufacturer agents and merchant wholesalers.
B.
We use both of them. 65% of our products are sold through the retail channel and 35% through the wholesale channel.
C.
With the wholesaler, the manufacturer can save a large amount of time and labor. Meanwhile, the wholesaler can save storage costs and administration costs for the manufacturer.
【简答题】若数列 为等差数列， ， ，则 .
【简答题】wholesale _____
【单选题】wholesale
A.
a company or a person that provides a particular type of product
B.
a person who tried to be more successful than you
C.
time when the seller repairs or replaces a product free of charge
D.
the selling of goods to the public,usually through shops
E.
the selling of goods to businesses,usually in large quantities
F.
help,advice or free repair that you get after you buy a product
【简答题】等差数列 前 项和 ，若 ，则 __________.
【简答题】已知{ }为等差数列，若 ， ,则 ________.
【简答题】启动 Photoshop CS6 软件,简述其工作界面分别由 ______ 、 ______ 、 ______ 、 ______、 ______ 部分构成?
【单选题】Which of the following statements about the wholesale and agency models for selling books is not true?
A.
In the wholesale model, the retailer decides at what price to sell a book to the consumer.
B.
Amazon surprised traditional publishers by selling e-books for below their wholesale cost.
C.
Amazon supports the agency model.
D.
A result of the agency model was that Amazon's prices on e-books rose.
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