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【判断题】
花键联接因为同时受力齿较多,所以受力不均匀严重。A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】公共财政的理论基础是（ ）。
【简答题】公共财政的理论基础是“公共产品”与“市场失灵”理论。( )
【单选题】A ________ is a set of interdependent organizations that help make a product or service available for use or consumption by the consumer or business user.
A.
product line
B.
product delivery network
C.
marketing channel
D.
consumer base
【简答题】v. to take in a liquid, gas or other substance from the suce or space around
【单选题】Which of the following does not influence the demand for a product?______.
A.
Consumer income
B.
The number of firms in the market
C.
The price of complementary goods
D.
The price of substitute goods
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