下列说法正确的是: A.力越大,位移越大,做功就越多 B.功的大小是由力的大小和位移的大小确定的 C.力和在力方向上发生的位移,是做功的两个不可缺少的因素D.虽然力是矢量,位移也是矢量,但是功不是矢量 答案:CD(2013·江苏,31)Shortly after suffering from a massive earthquake and________to ruins,the city took on a new look.A.reducing B.reduced C.being reduced D.having reduced