如图所示下方关于该图的说法错误的是( ) A.鱼线的拉力使钓鱼杆发生形变 B. 发布时间:2017-06-25 16:00 │ 来源:www.tikuol.com 题型:选择题 问题: 如图所示下方关于该图的说法错误的是( )A.鱼线的拉力使钓鱼杆发生形变B.瓶对海绵的压力使海绵发生形变C.球拍对球的作用力改变球的运动方向D.脚踢球使球飞出去,说明力是维持运动的原因
题型:选择题 选择正确的短语填空。do some reading take photos clean the classroom no smoking wash hands instead of stay out1. Chinese usually don't ______ on the first day of the Spring Festival.2. I went to see a movie ______ a play.3. We can use cameras to______ .4. Mother told me not to ______ after 10.5. Before meals, you'd better______ .6. What does "______" mean?It means "not smoke".7. Today it's my duty to ______. 查看答案
题型:选择题 小明将一石块抛向空中,石块离开手后,上升时速度越来越小,下降时速度越来越大,最终落向地面,若不计空气的阻力,石块离开手后,使其在空中运动状态发生改变的力是( )A.小明的推力B.石块重力C.空气的浮力D.以上三个力的合力 查看答案