题目

句型转换 1. The basketball player is 190cm tall. (同义句转换)   The basketball player is 190cm _________________________________. 2. They seem to know more about the accident than anyone else. (同义句转换)   _______________________________________ about the accident than anyone else. 3. Why not help that old grandma cross the road just now? (同义句转换)   ______________________________ that old grandma cross the road just now? 4. Betty is not as slim as Amy. (同义句转换)   Amy _____________________________________________________ Betty. 5. The students are going t一个25 kg的小孩从高度为3.0 m的滑梯顶端由静止开始滑下，滑到底端时的速度为2.0 m/s。取g=10 m/s2，关于力对小孩做的功，以下结果正确的是 (     )A.合外力做功50 J        B.阻力做功-500 JC.重力做功500 J         D.支持力做功50 J?