问题
多项选择题
当加氢反应有正碳离子生成时,主要生成的正碳离子是()。
A、叔正碳离子
B、仲正碳离子
C、伯正碳离子
D、甲基正碳离子
答案
参考答案:A, B
当加氢反应有正碳离子生成时,主要生成的正碳离子是()。
A、叔正碳离子
B、仲正碳离子
C、伯正碳离子
D、甲基正碳离子
参考答案:A, B
任务型阅读 | ||||||||||||
Mike Green is a bus driver(公交司机). He is in the USA. Mike is his first name. Green is his family name. This is his ID card. Its number is six - zero - three - mne -seven - two - mne. He works in an American bus company(公司).His telephone number is 212 -3478. His mobile phone(手机)number is 21237577689. Look! This is hisjacket. It's red. He likes red very much. ![]() | ||||||||||||
根据短文内容,完成下面表格。 | ||||||||||||
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