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【单选题】

Now there are sophisticated tests which can______ poisons in the tiniest amount not even enough to kill a mouse.
A．discern

B．ascertain
C．detect
D．locate
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根据网考网移动考试中心的统计，该试题：

8%的考友选择了A选项

29%的考友选择了B选项

57%的考友选择了C选项

6%的考友选择了D选项

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