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单选题

    Even if families don’t sit down to eat together as frequently as before, millions of Britons will nonetheless have got a share this weekend of one of that nation’s great traditions: the Sunday roast. (1)_____ a cold winter’s day, few culinary pleasures can (2)_____  it. Yet as we report now, the food police are determined that this (3)_____ should be rendered yet another guilty pleasure (4)_____ to damage our health.

    The Food Standards Authority (FSA) has (5)_____ a public warning about the risks of a compound called acrylamide that forms in some foods cooked (6)_____ high temperatures. This means that people should (7)_____ crisping their roast potatoes, reject thin-crust pizzas and only (8)_____ toast their bread. But where is the evidence to support such alarmist advice? (9)_____ studies have shown that acrylamide can cause neurological damage in mice, there is no (10)_____ evidence that it causes cancer in humans.

    Scientists say the compound is (11)_____ to cause cancer but have no hard scientific proof. (12)_____ the precautionary principle, it could be argued that it is (13)_____ to follow the FSA advice. (14)_____, it was rumoured that smoking caused cancer for years before the evidence was found to prove a (15)_____.

    Doubtless a piece of boiled beef can always be  (16)_____ up on Sunday alongside some steamed vegetables, without the Yorkshire pudding and no wine. But would life be worth living? (17)_____, the FSA says it is not telling people to cut out roast foods (18)_____, but to reduce their lifetime intake. However, its (19)_____ risks coming across as being pushy and overprotective. Constant health scares just (20)_____ with no one listening.

(10)

A
secondary
B
external
C
conclusive
D
negative
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答案:

C

解析:

答案精析:形容词辨析题。原文第三段首句提到have no hard scientific proof(没有确凿的证据),再结合前文中质疑是否有证据证明这个耸人听闻的建议(alarmist advice)和there is no ____ evidence that it causes cancer in humans(没有证据表明它会使人类身患癌症),可以推断出丙烯酰胺会使人患癌这件事仍缺乏确凿的或决定性的证据。conclusive表示“决定性的;确定的”,填入空格符合文章逻辑,故C项正确。

错项排除:将A、B、D三项代入原文分别表示:“次要的证据”、“外部的证据”和“负面的证据”,都不符合上下文语义,故均可排除。

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