由曲线<img src="https://static.zxtiku.com/wangke/imgs/topic/dfbbb3ae4af9a2831ebbe270106d29d9.jpg"/>和直线<img src="https://static.zxtiku.com/wangke/imgs/topic/bcb066b508272f22fe393458702db74d.jpg"/>所围成的平面图形的面积等于<br/> A、<img src="https://static.zxtiku.com/wangke/imgs/topic/92887a65b1e9750bbad4cc93d666341f.jpg"/><br/> B、1<br/> C、4<br/> D、<img src="https://static.zxtiku.com/wangke/imgs/topic/ccabfaedcf0a9505267ad231f8d44762.jpg"/>