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4.A【解析】本题[文]考查三角函数图象的[章]变换,考查逻辑推理[来]的核心素养8(x)[自]=2co2(-x)[知]=2cs(2x-2[嘛]
D本文是一篇说明文[答]。一款新电脑问世,[案]它有着与其他电脑不[网]同的优势。32.C[文]细节理解题。根据第[章]二段中的句子“ There is finally a computer that' s designed for simplicit[来]yand ease of use."可知,这款电脑的好[自]处就是简单、容易使[知]用。故选择C。33[嘛].B推理判断题。根[答]据第三段中的“ This computer is worry-fre[案]e and literally[网] puts the world at yourfinge[文]rtips."“ all you do is plug it into an outlet(插座[章]) and your high- speed Internet connectio[来]n”"It'ss0 easy to use that you won' t have to ask your children or grandchil[自]dren for help"可知,本段主要说明[知]这款电脑的优点。故[嘛]选择B。34.A细[答]节理解题。根据第四[案]段中的“Now, thanks to the WOw Computer,[网] countless[文] olderAmer[章]icans are discoveri[来]ng the wonderful[自] world of the Internet every day.."可知,美国老年人认[知]为这款电脑非常棒。[嘛]故选择A。35.D[答]推理判断题。本文介[案]绍了一款新的电脑,[网]如方便使用、简单易[文]学等优点,判断本文[章]选自广告。故选择D[来]
