1, let the average of a, b and c be m, the average of a and b be n, and the average of n and c be p. If A > B > C, the relationship between m and p.

A, M=P, b, m > p, c, m < p, d, uncertainty.

Choose B.

2. Let A, B and C be the lengths of three sides of A, B and C,

And a/b=(a+b)/(a+b+c), then the relationship between internal angles ∠A and ∠B:

A、∠B>2∠A，B、∠B=2∠A，

C, ∠ b < 2 ∠ a, d, uncertain,

Choose B.