单选题
A thermal camera is expected to detect deception by ______.
A、
showing the physiological changes in the liar's face
B、
scanning the liar's brain and his/her whole body
C、
catching the sudden movements of the liar's eyes
D、
screening the sudden rush of the liar's blood pressure
【正确答案】
A
【答案解析】
第五段提到other scientists said the discovery of previously unknown physiological changes in the face was itself an important step forward，所以正确答案是A(显示说谎者面部的生理变化)。
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