In this article, we give a classification of closed, smooth, spin,
1-connected 7-manifolds whose integral cohomology ring is isomorphic to that of
CP2×S3. We also prove that if a closed, smooth, spin,
1-connected 7-manifold has integral cohomology ring isomorphic to that of
CP2×S3 or S2×S5, then it admits a Riemannian
metric with positive Ricci curvature.Comment: 20 page