题目

阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。I'd thought I was ready for the challenges of graduateschool. But when I left Nepal to further my study abroad, I felt as if I haddropped into the vast ocean where every fish swam faster than I could. Thecoursework wore me out. Instead of being the outgoing person I had been, Isuddenly became a shy girl. Worse still, my research was not progressing at thepace I had expected.I needed something to return to my old self.After a conversation with my friend, I thought I should go to help others. ThenI began t（4分）已知：A是石油裂解气的主要成分，现以A为主要原料合成乙酸乙酯，其合成路线如图所示。请回答下列问题：（1） B物质中官能团的名称____________。（2） 写出反应③的化学方程式：______________________________。