A.Over 87,000 workers will lose their jobs in auto companies. B.Many people will have to say bye-bye to their high salaries. C.The employees' laid-off has a great impact on the American business. D.America can no longer take a lead in world economy.
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
皮皮学刷刷变学霸
举一反三
【简答题】有机物A、B、C的化学式均为C 5 H 8 O 2 ,E的化学式为C 5 H 7 BrO 2 ,A的碳链无支链,且1mol A能与4mol 银氨溶液完全反应。D转化为C时另一副产物为5元环状化合物,C分子中含有甲基。有关的转化关系如下图所示,试回答下列有关问题: ⑴B的结构简式为_____________。 ⑵E转化为F的反应类型为____________________。 ⑶A转化为I的离子方程...