题目内容
球头销磨损后转向盘自由行程间隙会变小。（）
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Product presentation is not important before customers show interested in product.
If customers have expressed their need for your product, there is no need to introduce the product anymore.
If necessary, let the customers use the new product personally.
You should use words such as “comfortable”, “attractive” todescribe the features of the product.
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