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微分方程y``+3y`+2y=0的特征根为( )

A、-2,-1

B、2,1

C、-2,1

D、1,-2

时间：2021-07-17 23:32 关键词：地质学专升本高数（2） 2020级第一学期期末考试期末考试城乡规划安全工程环境工程计算机网络技术高起专道路桥梁与渡河工程期末补考道路桥梁工程技术

答案解析

A

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