2. 外语
  3. America has now adopted more______European-style inspection systems, and the incidence of food poisoning is falling.

America has now adopted more______European-style inspection systems, and the incidence of food poisoning is falling.

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问题 America has now adopted more______European-style inspection systems, and the incidence of food poisoning is falling.
选项 A、discrete
B、solemn
C、rigorous
D、autonomous
答案C
解析 句意为：现在美国已经采用了更加严密的欧式检测系统，食物中毒发生率正在下降。根据句意，只有C项rigorous“严密的，严格的”符合句意，故选C项。A项意为“分离的”；B项意为“庄严的”；D项意为“自治的”，均不符合句意。
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