[名词解释] 打分矩阵(scoring matrix)
[名词解释] 社会核算矩阵(Social Accounting Matrix,简称SAM)是以矩阵形式反映的国民核算体系(SNA)
[名词解释] matrix (线粒体基质)
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[单选题]A.ccording to Figure 3, clasts and matrix particles having diameters greater than or equal to 0.5 mm made up approximately what percent of the total mass of the combined samples?A.13%B.33%C.63%D.83%
[多选题] 通常MMC(metal matrix composite)()A .采用高熔点、重金属作为基体。B .要比基体金属或合金的塑性与韧性差。C .要比基体金属或合金的工作温度高。D .要比基体金属或合金的弹性模量低。
[判断题] 水分析仪的图点格式转化成报告格式时需按MATRIX键。A . 正确B . 错误
[名词解释] Matrix-assisted laser desorption/ionization基质辅助激光解吸电离技术 (MALDI)