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【单选题】
在货代管理信息系统通常会有一个叫（）的模块，该模块有客户资源分析、客户忠诚度分析、客户信用度分析、货源分析、业务量分析、成本利润分析、资金压力分析等功能。A.
决策支持系统
B.
销售管理系统
C.
客户关系管理系统
D.
费用管理系统
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皮皮学刷刷变学霸
举一反三
【单选题】If a radial piston hydraulic pump fails to deliver rated fluid volume, the cause can be _____.
A.
contaminated fluid
B.
pitted thrust rings
C.
worn pintle bearings
D.
obstructed suctions passage
【简答题】山顶点提取.zip 已经给定DEM,1求取该DEM的坡向变量;2提取DEM的山顶点和山谷点
【简答题】radial piston pump
【单选题】An axial轴向 piston pump differs from a radial piston pump as the pistons of an axial piston pump are positioned （）.
A.
radially from the shaft
B.
parallel to each other and to the shaft
C.
parallel to each other but at a right angle to the shaft
D.
at an angle to each other and to the shaft
【单选题】With reference to a radial piston pump, which one of the following statements is false?
A.
Surrounding the fixed shaft is a hollow shaft
B.
This hollow shaft carries radial bores
C.
Each bore is fitted with a well-lapped plunger
D.
There are always even numbers of bores
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