A. Chest models are more convenient. B. Frostless freezers must be defrosted by hand. C. The cool and dry spot will shorten compressor life. D. Keep the freezer at least three-quarters full. 参考答案:D 答案解析:本题考查对细节内容的把握。从第二段“Uprights are more convenient”可知, chest model并不具有使用方便的优势,因此A项不对;从第三段“Frostless free