中国药典中采用气相色谱法定量主要方法是:
A.面积归一化法
B.对照品法-主成分自身对照法
C.内标法、外标法
D.内标法加校正因子
E.A+B+C+D
参考答案:E
______ that Mr. Thomson got such rare fishes
A. When and where was itB. When and where it wasC. Was it when and whereD. When and where Were it
主要控制系统的类型有哪些?