Solution: (1) Let "Team A and Team B are just in the top two" as event A,

Then P(A)= =

So the probability that Team A and Team B are just in the top two is.

(ii) The possible values of the random variable x are 0, 1, 2, 3.

p(X = 0)= =；

p(X = 1)= =；

p(X = 2)= =；

P(X=3)= =

So the distribution list of x is

∴EX=0× + 1× +2× +3× = 1