题目内容
The last element of the chain is less important than all the others.
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Distribution management consists of four units, they are the sales management, products delivery, transport management and financial management divisions.
Packaging can’t be used to inform customers about the product’s contents, uses, advantages, features.
The advantages of motor transport are flexibility of both location and time and speed of delivery.
外啮合齿轮泵中啮合线把密封容积分隔成两部分，轮齿进入啮合侧描述正确的是（ ）。
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