轮胎印迹有效中心
参考答案:
路面与轮胎印迹面积内的压力中心。当车轮侧倾时,轮胎印迹有效中心沿侧倾方向移动。
按要求改写句子。
1. He goes to school at 7: 40 in the morning. (对画线部分提问)
_____________ _____________ he go to school in the morning?
2. Kate is sitting at the table. (变为一般疑问句)
_____________ Kate _____________ at the table?
3. They go home by bike. (对画线部分提问)
_____________ _____________ they go home?
4. He likes playing table tennis at school. (变为否定句)
He _____________ _____________ playing table tennis at school.
5. Are you going to go fishing with me? (肯定回答)
Yes, I _____________.
换季保养可以结合二、三级保养进行。