Statistics indicate that women are ________ shoppers in Europe, contributing to four­fifths of annual online shopping sales.

A．enthusiastic

B．potential

C．traditional

D．intelligent

气相色谱分析仪的检测器的作用是把由色谱柱流出组分的浓度信号，通过某种原理使其转换成电信号，常用的检测器有（）。

A.热导式检测器（TCD.

B.氢火焰检测器（FID.

C.火焰光度检测器（FPD.

D.以上三种