题目

As we have known from the map of the world, this is ________. A. twice as large as that island            B. twice as larger as that island C. as twice large as that one                   D. twice as large island as that 答案：A是晓军玩弹弓的情景．经验表明，橡皮筋拉得越长，同样的“子弹”射得越远，这说明橡皮筋的弹性势能与橡皮筋的________程度有关；若橡皮筋被拉伸的长度相同，而所用“子弹”的质量不同，则质量大的“子弹”射出的距离较小，原因是质量大的“子弹”射出时的速度________．（选填“大”或“小”）