a tipster sheet的用法和样例：
- According to a tipster, the next Pre may be a lower-cost, candybar-style phone without a QWERTY keyboard.
- Importantly, however, a tipster paints Apple as attempting to outmaneuver CMX through its rumored Cocktail format for whole albums.
- The letter was written on a single sheet of paper.
- Yes. There will be different models, in different shapes and sizes.According to a tipster, the next Pre may be a lower-cost,candybar-style phone without a QWERTY keyboard.
- The curtains were enveloped in a sheet of flame.