第7题: [单项选择]下列关于惯性的说法中正确的是() A. 物体只有静止或做匀速直线运动时才有惯性 B. 物体只有受外力作用时才有惯性 C. 物体运动速度大时惯性大 D. 物体在任何情况下都有惯性 参考答案:D 答案解析:惯性是一切物体的固有属性,与物体的运动状态、是否受力、速度大小无关,惯性大小的唯一量度是质量,D正确。
第32题: [单项选择]What does the lady tell the man about Mr Brown He ______. A. is under operation now B. is going to have the operation C. has already had his operation 参考答案:C 答案解析:[听力原文] <17>-<18> M: Have you heard whether Mr. Brown will have to have the operation or not W