CURRICULUM

Water Resources: Four Difficulties, 4000 Levels

Water Resources has four difficulties with 1000 levels each and ten questions per level; count risk before choice. Resource levels focus on the water cycle, demand and quality. For each balance, name the inflow, the outflow and the period.

水资源基础闯关Water Basics1000 关水资源进阶闯关Water Intermediate1000 关水资源高阶闯关Water Advanced1000 关水资源挑战闯关Water Challenge1000 关

How it works

  1. Start at the basic difficulty.
  2. Ten questions per level; clear one to unlock the next.
  3. Review at 1/3/7/14/30 days.

FAQ

Which difficulty?

Start at basic and move up when accuracy stays above 80%.

How many levels each?

1000.