第11题: [单项选择]Passage One Questions 26 to 28 are based on the passage you have just heard. A. From several myths. B. St. Valentine was put to death on the 14th of February. C. St. Valentine was a legendary romantic. D. St. Valentine was in disfavour with the Roman emperor. 参考答案:D 答案解析:[听力原文] According to scholars, who was St. Valentine around 270
第21题: [多项选择]下列说法正确的是() A. 速度越大的物体,加速度一定越大 B. 速度为零的物体,加速度也一定为零 C. 加速度为零,速度可能很大 D. 加速度增大,速度可能减小 参考答案:C, D 答案解析:速度与加速度之间没有直接的关系,即加速度大小和速度大小没有任何关系,速度越大,加速度不一定越大,比如高空匀速飞行的飞机,速度很大,但是加速度为零,A错误C正确;速度为零,物体的加速度不一定为零,比如物