题目

现有一种烃可表示为,该烃主链的碳原子数应是(    ) A.11                        B.9                       C.10                    D.12 答案：解析：可沿  曲线找出最长的碳链有11个碳。答案：AI told him what I was surprised____________  his attitude towards his studyA.isB.wasC.at isD.at was