判断题

理想流体伯努力方程的物理意义是：在管内作稳定流动的理想流体，在任一截面上的压力能、势能和动能可以互相转换，但其总和不变

答案：正确

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单项选择题

在Excel中建立图表时，我们一般会
A、首先新建一个图表标签
B、建完图表后，再输入数据
C、在输入的同时，建立图表
D、先输入数据，再建立图表

不定项选择

Process essays can be of two types: instructional and analytical. Instructional process essays are “how-to” essays which instruct the reader about how to do something. Analytical process essays tell how something happens or happened. Identify each process essay thesis statement as instructional (√) or analytical (×).
The digestive process involves several related steps

A．正确
B．错误