1. Kí hiệu các tập bằng các chữ cái lớn: A, B, …, N, X, Y, … Kí hiệu các phần tử của tập là các chữ cái nhỏ: a, b, x, y, … Hệ thức nào sau đây là đúng?

As the coach of the u. s. olympic cycling team, i can state without question that the swedish and french teams were using illegal steroids. how else could they have beaten us so badly in the last competition? the u. s. team trained much harder and was much more skilled than our opponents. we only lost because a few teams cheated.

How did the shift to farming affect native american cultures?

Civilization developed largely as result of?