When two people throw the bottle cap in the front, they will throw it in the back. Right?

Because the bottle cap material is uneven, the probability of facing up is not equal to the probability of facing up, which is different from the coin toss test.

The correct statement of this question should be: D. Although there is no guarantee that you will get 500 heads-up and 500 heads-down when you throw 1000 coins, it can be predicted that the number of heads-up will be very close to that of heads-down.