______ drinking is harmful to the health. A: Excessive B: Concessive C: Depressive D: Emissive

普朗克定律(Planck's distribution law)描述的是( ) A: 黑体发射力(Total, hemispherical blackbody emissive power) B: 黑体光谱半球发射力(Spectral, hemispherical blackbody emissive power) C: 黑体光谱定向发射力(Spectral, hemispherical blackbody emissive power) D: 光谱辐射强度(Spectral Intensity of the emitted radiation)

Britain has agreed to cut ( ) of nitrogen oxide from power station. A: emissive B: emit C: mission D: emissions