题目

—There is a story here in the paper about a 110-year-old man.     —My goodness! I can't imagine______ that old. A. to be           B. to have been      C. being            D. having been 答案：C 解析: 考查非谓语动词。因imagine后只能用动词的-ing形式。如表是KNO3、NaCl在不同温度下的溶解度．根据表中数据回答下列问题：温度/℃10203040506070NaCl的溶解度35.836.036.336.637.037.337.8KNO3的溶解度20.931.645.863.985.5110.0138.0（1）10℃时，NaCl的溶解度是 g．（2）30℃时20gKNO3加入在50g水中形成的溶液是 （填“饱和”或“不饱和”）（3）KNO3和NaCl溶解度相等的最小温度范围是 （4）60℃时，等质量的KNO3和NaCl的饱和溶液，降温至20℃时 溶液中析出晶体多，剩余溶液中溶剂质量多的是 溶液．