在煤粉锅炉各项热损失中,()的热损失所占比例较大。
A、灰渣物理热损失;
B、散热损失;
C、排烟热损失;
D、固体未完全燃烧热损失。
参考答案:C
Due to a constAntly ______ environment, a poor understanding of the user’s needs and preferences,as well as a ______ of willingness to modify ______ organizational structures and decision models,the full economic potential of Web Information Systems(WIS) has not been realized by now. The data object types of the ______ meta model,the Extended World Wide Web Design Technique(eW3DT),provide hypertext designers ______ a conceptual,user-centric framework and graphical notation for the construction of both,______ and customized models, during the software development ______ of commercial WIS. A reference model as a normative concept represents an abstraction of a ______ company,its functional units, or its(Web) Information System and is intended to streamline the design and implementation of complex applications at ______costs. As precondition for pursuing a partial globalization strategy,eW3DT ______ between technical and content-specific responsibilities for designing, implementing, and maintaining WIS.
A.Existing
B.the
C.fact
D.company
盘式制动器当制动衬垫的有效磨损厚度达到约()mm时,则应更换新的制动衬垫。
A、2
B、3
C、4
D、5