组合体俯视图画法正确的是（）<br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/cd43d7bd6f72655b28adf441e634e6a8.jpg"/><br/> A、<img src="https://static.zxtiku.com/wangke/imgs/topic/5ad53603d18cfe21844a7a16a9fc3d78.jpg"/><br/> B、<img src="https://static.zxtiku.com/wangke/imgs/topic/7bbfc796e825b7204103a3ce34311d56.jpg"/><br/> C、<img src="https://static.zxtiku.com/wangke/imgs/topic/4ca89f964f9d9259e9c8d3e334b484e4.jpg"/><br/> D、<img src="https://static.zxtiku.com/wangke/imgs/topic/c7040474d73bc6930253f3bd2b0a2d3c.jpg"/>