The Ravens’ win against the Oakland Raiders on Sunday could serve as a taking-off point. But it’s not just about wins and losses. The Ravens (3-2) are expected to beat the Chicago Bears (1-4) this weekend at M&T Bank Stadium, but showing improvement is almost as important as winning. It’s called continuity. The good teams develop consistency as the season progresses, and the Ravens need to show some. They were solid in the first two games in wins against the Cincinnati Bengals and Cleveland Browns. But they were lethargic and humiliated in back-to-back losses to the Jacksonville Jaguars and Pittsburgh Steelers. They rebounded with a strong effort against the Raiders, but now the key question is whether they can do it again.