2010注化考试中2题求解? 微分方程ydx+(x+y)dy=0的通解() A (x-y/2)y=c B xy=c(x-y/2) C xy=c D y=c/ln(x-y/2) 微分方程y"+2y=0的通解() A y=Asin2x B y=Acosx C y=sin2 1/2 x+Bcos2 1/2 x D y=Asin 2 1/2 x+Bcos2 1/2 x 查看更多4个回答 . 4人已关注
硝酸铝分子结构式如何在aspen中输入? 硝酸铝 分子结构式如何在aspen中输入?我输入mol文件编译不出来铝原子,只有N、O原子。 提示如下: FUNCTIONAL GROUP GENERATION FOR THE RUZICKA METHOD CANNOT BE COMPLETED FOR COMPONENT AL(NO3)3. THE FOLLOWING ATOMS WERE NOT MATCHED: N 1 O 2 O 3 O 4 N 5 O 6 O 7 O 8 N 9 O 10 O 11 O 12 查看更多1个回答 . 3人已关注