What did the scientists do to…——2009 高考英语第 50 题答案解析

【解答】
What did the scientists do to find out if the e-nose worked?
A. They presented it with all common crops..

B. They fixed 13 sensors inside the device.
C. They collected different damaged leaves.
D. They made tests on damaged and healthy leaves.
【解析】细节理解题。根据倒数第三段前两句“To test the nose……”，【答案】Ｄ。