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泵在工作时下述五种原因造成了能量损失，试判断分别属子那类损失：

泵内零件间或零件与流体间的摩擦损失。（）

A.泵的机械损失

B.泵的容积损失

C.不属于泵的损失

D.泵的总效率

答案

参考答案：A

单项选择题

下列关于道观的说法不正确的是( )。

A．道观布局和形式，大体仍遵循我国传统的宫殿坛庙体制

B．道观以殿堂，楼阁为主，中轴对称，纵深布局

C．目前保存较完整的道观，以元代中期的山西永济县永乐宫为代表

D．清真寺必须朝向圣地麦加，其必设高耸的召唤信徒使用的邦克楼，以及净身的浴室
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单项选择题

The analysis phase answers the questions of who will use the system，what the system will do，and where and when it will be used．During this phase，the project team investigates any current system，identifies （），and develops a concept for the new system．This phase has three steps：first，（）is developed to guide the project team’s efforts．It usually includes an analysis of the current system and its problems，and the ways to design a new system．The next step is （）．The analysis of this information-in conjunction with input from the project sponsor and many other people-leads to the development of a concept for a new system．The system concept is then used as a basis to develop a set of business analysis models that describes how the business will operate if the new system were developed．The set of models typically includes models that represent the （） necessary to suppor the underlying business process．Last，the analyses，system concepts，and models are combinedin to a document called the （），which is presented to the project sponsor and other key decision makers that decide whether the project should continue to move forward．

The next step is （）．

A．project scope definition

B．problems analysis

C．decision analysis

D．requirements gathering
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