题目

 When he came to himself, he found himself______on a chair, with his hands  ______back. A. to sit; tying                                                  B. sitting; tying C. seating; tied                                                 D. seated; tied 答案：【解析】选D。句意为：他醒来后发现自己坐在椅子上，双手被绑在后面。第一个空表示“就座”，用seated(be seated)或sitting(表主动)；tie和hands是动宾关系，故用过去分词，构成“with+名词+过去分词”。铁的比热容为0.46×103J/（kg．℃），质量是0.5kg的铁，温度从120℃降低到80℃时，放出的热量是92009200焦．