题目内容
人口迅速增长，加快了对生态环境的破坏，这会危及到人类生存条件的改善和生活水平的提高。()
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SECTION 1 Vocabulary Selection
In the section, there are 20 incomplete sentences. Below each sentence, there are 4 choices respectively marked by letters A,B,C and D. Choose the word or phrase which best completes each sentences. There is only ONE right answer.
In the informal meeting the exporter learned that the importer was interested purchase rather than prepacked sets of 12.
自然环境对生物的生态作用是各个生态因子共同组合在一起，对生物起的综合作用。()
A year ago the firm had a ______ loss of 3 million dollars or 20 cents a share after all necessary deduction.
在群落的自然分类系统中，有的以群落区系组成为分类基础，有的以其生态外貌为基础，还有的以其动态特征为基础。()
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