题目内容
（请给出正确答案）
[主观题]
What, according to the passage, makes the research conducted by the scientists at the Oreg
on Department of Health so unique？
A．The fact that the scientists managed to measure the average hourly increase of NNK.
B．The fact that the scientists succeeded in making more people realize the harm of smoking.
C．The fact that the scientists did a lot of experiments on smokers in public areas.
D．The fact that the scientists discovered NNK, a carcinogen in cigarette smoke.
答案
查看答案
