编制综合指数时必须明确“指数化指标”和“同度量因素”两个概念。
参考答案：对
Do you know the teacher _____ daughter is studying at No.2 Middle School?[ ]
A. who
B. that
C. whose
如图所示，一半球真空辐射炉，球心处有一尺寸不大的圆盘形辐射加热元件，加热元件的定向辐射强度和辐射量有（）关系。
A．IOA＞IOB，qA＞qB
B．IOA＜IOB，qA＜qB
C．IOA=IOB，qA＞qB
D．IOA=IOB，qA＜qB
