本书严格按照国家教委颁布的《大学英语教学大纲》和《大学英语四、六级考试大纲》的要求编写。其目的是帮助考生迅速、有效地提高四、六级考试的应试能力。
本书是《卡式英语》系列中的强化训练用书,与《大学英语词汇速成》一书配套学习,旨在考生熟练掌握大学英语词汇的同时,使得考生的综合解题能力得以迅速提高。这也是《卡式英语》系列的独到之处。尤其对于将要通过大学四、六级英语考试的考生而言,使用与不使用本系列书籍,将有着天渊之别。
Insects'lives are very short and they have many enemies, but they must survive long enough to breed and perpetuate their kind. The less insectlike they look, the better their chance of survival. To look "inedible" by resembling or imitatin plants or objects that hold no interest for their enemies is a deception widely practiced by insects. Mammals rarely use this type of camouflage, but many fish and invertebrates do .
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