单选题 The only safe way of distinguishing between edible and poisonous mushrooms is to learn to ______the individual species.
  • A.identify
  • B.classify
  • C.isolate
  • D.separate
【正确答案】 A
【答案解析】[解析] A选项identify(识别)符合题意，如：The markings are so blurred that it is difficult to identify．(标记模糊不清，难以识别。)B选项classify(分类)、C选项isolate(使孤立)、D选项separate(分离)都不正确。本题空格处是说学会识别单独的种类。因此A选项为正确答案。