A.1
B.-1
C.k
D.1/k
[单选题]已知xy=kz(k为正常数),则等于( )。A.1B.-1C.kD.1k
[单选题]已知xy=kz(k为正常数),则等于( )。A.1B.-1C.kD.1k
[单选题]已知xy=kz(k为正常数),则等于( )。A.1B.-1C.kD.1k
[单选题]已知xy=kz(k为正常数),则等于( )。A.1B.-1C.kD.1k
[单选题]已知xy=kz(k为正常数),则等于( )。A.1B.-1C.kD.1k
[单选题]已知xy=kz(k为正常数),则等于( )。A.1B.-1C.kD.1k
[单选题]A.16mg/LB.32mg/LC.64mg/LD.128mg/L
[单选题]A.设浓缩池2座,每座直径5.00mB.设浓缩池2座,每座直径8.00mC.设浓缩池2座,每座直径10.00mD.设浓缩池1座,直径12.00m
[单选题]已知为某函数的全微分,则a等于( )。A.-1B.0C.1D.2
[单选题]已知为某函数的全微分,则a等于( )。A.-1B.0C.1D.2