— I prefer western food. It’s tasty and good for us.

—_______? But western food is said to be high in sugar and fat.

A．Is that right

B．How do you know that

C．Do you really think so

D．Who told you that

下列关于内标法说法正确的是（）。

A.进样量不超量时，重复性及操作条件对结果无影响

B.只需待测组分和内标物出峰，与其他组分是否出峰无关

C.适合测定微量组分

D.制样要求高，找合适内标物困难