题目

句型转换 根据括号内的要求改写句子，在答题卷相应的横线上填写答案，每空限填一词。1.My mother does housework every evening.(改为一般疑问句)____________ ____________ mother____________ housework every evening？2.My grandfather enjoys reading newspapers in the morning.(对划线提问)__________ __________your grandfather__________ __________ in the morning?3. Kitty can draw well. (同义句转换) Kitty is __________ __________ __________.4.They usually play volleyball in the playground after school..(对画线部分提问） _________ __________ ____18．如图所示，置于圆形水平转台边缘的小物块随转台加速转动，当转速ω=2rad/s时，物体恰好滑离转台开始做平抛运动．现测得转台的半径R=1.0m，设物块所受的最大静摩擦力等于滑动摩擦力，则物块与转台间的动摩擦因数μ为（　　）A．0.5B．0.4C．0.3D．0.2