|
i think 25F get the exact idea delivered by ETS, though admittedly, this is different from most chinese thinking manner.
OG: the health official's explanation assumes that the decrease in the number of people diagnosed with the disease accurately reflects a diminution in cases of the disease. By pointing out that this assumption is false, C is the best answer.
likely errors:
1> over emphasis on time 5yr, 10yr
2> focus on sanitary conditions of water
Or see it from another angle: A,B,E are about water, B is an evidence other than water. If B can weaken the explanation, it is the most serious one. Besides, D is totally irrelevant, because it is about severity rather than incidence. ( this method cannot be widely applied)
[此贴子已经被作者于2005-9-19 22:02:56编辑过] |