题目

―Excuse me, I wonder if you can help. I ______ my ID card.  ―But where did you lose it?  A. have lost                 B. lost                    C. had lost                  D. lose   答案：A12．锡的熔点是232℃，那么232℃的锡（　　）A．一定是固态B．一定是液态C．一定是固液共存状态D．以上都有可能