第一章 单元测试

1、多选题：
What are the two basic criteria to distinguish fluid machines？（ ）
选项：
A:Drum machine
B:Driving machines
C:Driven machines
D:Turing machine
答案: 【Driving machines;
Driven machines】

第二章 单元测试

1、判断题：
Shear stress at a point is the limiting valueof shear force to area as the area is reducedto the point.（ ）
选项：
A:错
B:对
答案: 【对】

2、判断题：
For gasdynamics, we have toconsider the mechanics of the flow simultaneously with the thermal dynamics of thegas.（ ）
选项：
A:错
B:对
答案: 【对】

3、判断题：
A fixed amount of a gas, by itselfin a container, will always expanduntil its volume equals that of thecontainer.（ ）
选项：
A:错
B:对
答案: 【对】

4、判断题：
The degree of mixing is a function of thecharacteristies of the wastewater and theambient liquid (such as density) as well asthe discharge velocity of the wastewater.（ ）
选项：
A:对
B:错
答案: 【对】

5、判断题：
A machine in which energy from the fluid is converted directlyto the mechanical energy of a rotating member is known as aturbine (from the Latin turbo, a circular motion).（ ）
选项：
A:对
B:错
答案: 【对】