Although Perkin's fame was achieved 这里的achieved 是什么词性啊是被动语态 还是 主系表结构啊?

Although Perkin's fame was achieved 这里的achieved 是什么词性啊是被动语态 还是 主系表结构啊? 什么是perkin反应? although Perkin反应机理如题. JUST WAIT ALTHOUGH IT'S NO Mr Perkin a----- wore the same clother as other people,ate the same food as other people,and did the same things a--- work.One day ,Mr Perkin stood at the bus stop and w---- the cars go by.Many of the cars were new Beta 400s,and most of them were yel Mr Perkin stood at the bus-stop and watched the cars go by.Many of the cars were new Beta 400s,and most of them were yellow.Mr Perkin always wore the same clothes as other men,ate the same food as other people,and did the same things after work,and a Perkin缩合机理,最好有图解, perkin反应的反应机理是什么?perkin反应的电子是如何转移的, although the 1920s were prosperous,speculation in the stock Although they aren't twins,theyare s( ) in some ways. Although he 's wealthy,he spends little on clothes.翻译 何种结构的酯能进行perkin反应 1、具有何种结构的醛能进行Perkin 反应? PERKIN反应为何要无水条件?要干燥的为何? perkin反应合成肉桂酸的化学方程式只要方程式就可以了...就是苯甲醛perkin反应合成肉桂酸 although it's not easy to tell_______ it's good or bad.a if b.whether it's is December here.It's summer in Australia用Although连接成复合句