如果销售额为100亿元，物流成本为10亿元，那么物流成本消减1亿元，不仅直接产生了1亿元的利益，而且因为物流成本占销售额的10%，所以间接增加100亿元的利益，这就是物流成本消减的乘数效应。
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What we have seen_____.
A. from what we heard
B. all what we heard
C. to what we have heard
D. from what we have heard
老年男性，进行性排尿困难多年，无血尿，指肛检查前列腺Ⅱ度肿大，未及硬结。B超示前列腺4.3cm×5.5cm×6.2cm大小，血PSA2.1ng/dl，首先考虑的是
What is the discoursal arrangement of the passage？
A. Criticize first and then introduce new idea.
B. Describe first and then criticize.
C. Introduce the main idea and then make discussion.
D. Introduce the expertise of the chefs and then start to talk about new books.
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