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【单选题】
一阶线性微分方程是A.
当Q(x)恒等于0时,为线性方程,使用可分离变量法求解
B.
当Q(x)不恒等于0时,为非线性方程,基于对应的方程的通解,使用常数变,或者说待定函数法求解;也可以直接利用通过常数变得到的通解计算公式直接得到通解
C.
将原方程转换为可分离变量的微分方程求解
D.
具有这种结构的方程可以使用分离变量法求解.
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