He told ______ lie to his friends that he was heavily in ______ debt because he wanted to borrow some money from them.

A．a; the

B．a; a

C．不填；the

D．a; 不填

在待测试样中掺入一定含量的标准物质，把试样中待测相的某根衍射线条强度与掺入试样中含量已知的标准物质的某根衍射线条相比较，从而获得待测相含量的定量分析方法称为（）

A、外标法

B、内标法

C、直接比较法

D、K值法