  We study universe models which are intrinsically closed and are full of a
quintessence scalar field, besides the Cold Dark Matter component. We use these
to depict diverse flat Cold Dark Matter models. With the background geometry
specified by the Friedman-Robertson-Walker metric, we include among them the
standard Cold Dark Matter, the Cosmological Constant Cold Dark Matter and the
Dark Energy or Quintessence Cold Dark Matter models. After describing these
models, we determine the position of the first Doppler peak of the Cosmic
Microwave Background anisotropy spectrum for $\Omega_T$ close to one; we also
study the shift parameter $R$.
