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单词识记： simplify software convenience criterion suppose system technical universal virus technology advance telescope document planet screen solar gravity print digital download 短语扫描： information products信息产品 in the field of science 在科学领域 in storage储存 living standard生活水平 negative effect负面影响 shop on the Internet网购 stand out杰出 side effects 副作用 watch over看守；监视 contribute (sth.) to sth.向……贡献…… [跟踪训练] 在空格处填入适当的词(1个单词)或所给词的正确形式 1．She (simplify) the instructions so that the children could understand them. 2．The insurance industry has produced its own proposals for (universe) health care. 3．The foreign ministers of the two countries signed a lot of (document) today. | 
