原油期货价格 505510 505510 12 506 12506 美元/桶WTI1-3WTI3-6 2.5 2.0 1.5 1.0 0.5 0.0 8/309/149/2910/1410/2911/1311/2 美元/桶Brent1-3Brent3-6 3.0 2.5 2.0 1.5 1.0 0.5 0.0 8/309/149/2910/1410/2911/1311/2