作业场所存在的物理性职业危害因素主要有( )。 A．噪声 B．振动 C．辐射 D．

火热邪气的性质和致病特点是（）。

A.易伤阳气

B.主收引

C.多易伤肺

D.易生风动血

E.易于引起流行

比的（    ）除以（    ）所得的（    ），叫做比值。

During execution, a functional manager asks you to use a model C generator of model B on your project. The functional manager says that model C will solve the needs of the project and provide some benefits to the manufacturing department. You look at the cost associated with model C and discover that it is substantially higher than model B. If you are not sure you can justify the more expensive model, what do you do

A) Review the specification of each to validate the manager’s claims.
B) Measure the differences in using each model and present them to senior management.
C) Use model C and cut other tasks to make up for the added cost.
D) Do a life cycle analysis and present the results to your boss.

毒蕈中毒的常见原因（）。

A.加热不彻底

B.未加碱破坏有毒成分

C.误食

D.有害化学物质污染

E.不恰当的保藏方法

凯氏定氮法测定蛋白质含量的样品处理时，在CuSO和KSO存在下，与样品物质一起加热的是（）

A.浓HNO₃

B.浓H₂SO₄

C.浓HClO₄

D.浓HCl

E.王水