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外语
Now there are sophisticated tests which can_____poisons in the tiniest amount not even enough to kill a mouse.
Now there are sophisticated tests which can_____poisons in the tiniest amount not even enough to kill a mouse.
admin
2012-03-21
39
问题
Now there are sophisticated tests which can_____poisons in the tiniest amount not even enough to kill a mouse.
选项
A、discern
B、ascertain
C、detect
D、locate
答案
C
解析
动词辨析。detect:discover(the presence or existence of sth.)“察觉、发现”,如:The dentist coulddetect no sign of decay in her teeth.牙医在她的牙齿上找不到蛀蚀的迹象。discern:see clearly with eyes or mind,“辨明”、“识别”,主语一般是人或指人未辨别某事,如:It is difficult to discern the truth,很难了解真相。ascertain“确知”、“探询”,.如:We must ascertain the usual customs of the local people and arrange accordingly.我们必须了解当地人民的风俗习惯,做出相应安排。locate“寻找……的地点”,如:I cannot locate the shop.我找不到这家商店。
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专业英语四级
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