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当前学科:初级常减压装置
题目:
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()是单位时间内流体沿流动方向流过的距离。
A . 流速
B . 管道截面面积
C . 动能
D . 流量
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Dear Sirs, We have received your letter of Feb.23 that ponited out the price offered by us for our product is found to be on the high side.We regret to say that there is no possibility of our cutting the price to the extent you indicated,i.e.3%.These days,we have received a crowd of inquiries from buyers in other directions and expect to close business at something near our level.At present,we cannot see our way to entertain your counter-offer. We assure you that your inquiries will receive our immediate attention. Yours truly, (Signature)
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