请教GWD1-Q17和GWD1-Q18和GWD1-Q33

安静的小兔

GWD1-Q17:
B.    No musical instrument that is known to have used a diatomic scale is of an earlier date than the flute found at the Neanderthal campsite.

为什么不能选B呢？ 没有发现比在N营地发现的这根骨笛再早的了， 也可以support thousands of years before it was adopted by Western musicians吧

请牛牛指教！

numbangel

18题，我觉得最后一句是关键But since physicians have the final say as to whether to prescribe a medication for a patient, the objection provides no grounds for concern.然而题目问的是哪一项能最有效的去评价opponents的argument.所以E是最有效的信息啊。如果医生succumb to pressure from patients to prescribe inappropriate medications，那么材料最后一句就没用了，进而成为了最有效的去评价argument的关键信息。
帖子久了，掘墓不好，请谅解，给后来查的人看吧。

sophiewangapo

thx so much fot the explanation