根据尺寸链图,可以确定封闭环和增、减环如下( )。<br>·<img src="https://zk.995w.com/lqwvjeImg/cf/cfecc45adefa0f68d7933d06a87cbf6b.png">为封闭环，<img src="https://zk.995w.com/lqwvjeImg/34/34ee10c1dcba7472b42c68ab1ca0d18c.png">为增环，L为减环<br>·<img src="https://zk.995w.com/lqwvjeImg/34/34ee10c1dcba7472b42c68ab1ca0d18c.png">为封闭环,<img src="https://zk.995w.com/lqwvjeImg/cf/cfecc45adefa0f68d7933d06a87cbf6b.png">为增环,L为减环<br>·L为封闭环,<img src="https://zk.995w.com/lqwvjeImg/34/34ee10c1dcba7472b42c68ab1ca0d18c.png">为增环,<img src="https://zk.995w.com/lqwvjeImg/cf/cfecc45adefa0f68d7933d06a87cbf6b.png">为减环<br>·<img src="https://zk.995w.com/lqwvjeImg/cf/cfecc45adefa0f68d7933d06a87cbf6b.png">为封闭环,L为增环, <img src="https://zk.995w.com/lqwvjeImg/34/34ee10c1dcba7472b42c68ab1ca0d18c.png">为减环