[x,y,z]=dsolve('Dx=-(y/z+0.006)','Dy=(10.24*9.8-(9.8*sint+z^2*x)*exp(0.5*(t+pi/2)))/z*11.24','Dz=z*0.006/x+2*y/x+9.8*cost/(z*x)','z(0)=0.00001','y(0)=0','t');plot(t,x(:,1));然后出不来结果，这是为什么？
