双滑块摇杆机构在运动过程中某瞬时处于图示位置处，此时A、B、C三点的速度大小分别用<img src="https://static.zxtiku.com/wangke/imgs/topic/8fdd86e502f4680a38d6df6c8e886fa9.png"/>、<img src="https://static.zxtiku.com/wangke/imgs/topic/8a57bbe2ba00b241687923bbced636cb.png"/>、<img src="https://static.zxtiku.com/wangke/imgs/topic/7a4396130647c58667c111603762a1d9.png"/>表示，AC和BC两杆角速度的大小分别用<img src="https://static.zxtiku.com/wangke/imgs/topic/d9629ad6ca742c01361e336c64863e8d.png"/>和<img src="https://static.zxtiku.com/wangke/imgs/topic/77e26841da7fb5abfc47a3a9f1d627b6.png"/>表示。已知<img src="https://static.zxtiku.com/wangke/imgs/topic/26724c0710b46537515e3c10e0405b25.png"/>，<img src="https://static.zxtiku.com/wangke/imgs/topic/bb108f083eca579a107431995d02902f.png"/>，则有（）<img src="https://static.zxtiku.com/wangke/imgs/topic/4f78f755de3234d2d2128e5e66ec95ec.png"/>