2015 Shanghai Question 2 Single-choice Differentiating 2015_上海卷 (物理) 2.如图,P为桥墩,A为靠近桥墩浮出水面的叶片,波源S连续振动,形成水波,此时叶片A静止不动。为使水波能带动叶片振动,可用的方法是 A. 提高波源频率B. 降低波源频率C. 增加波源距桥墩的距离D. 减小波源距桥墩的距离 Answer keyB ☆ SaveCan't do it, show the explanation查看原卷 →