下列化合物最稳定的构象是（）<br>·<img title="6658215615618278" alt="8.jpg" src="/lqwvjeImg/3c/3ce7e0db415a1274f98439cbf9898018.jpg"><br>·<img title="6531076495662266" alt="8.jpg" src="/lqwvjeImg/bd/bdd02af9297bc5380fe5e6cdfdb419a2.jpg"><br>·<img title="6789810585869473" alt="8.jpg" src="/lqwvjeImg/f1/f1a08e96031e1ad55c876066579cb074.jpg"><br>·<img title="5072096274815073" alt="8.jpg" src="/lqwvjeImg/5c/5c81afa4bae8533e8f5ca0d6aadb4f8d.jpg">