题目

下列各组物质不能发生反应的是： A、镁与稀硫酸      B、锌与硫酸铜溶液    C、铝与硝酸银溶液   D、汞与氯化铜溶液 答案：DHe was hit by a falling tree and died on the ________.A. spot B. pointC. track D. trace