It's hard. I'll give you some first. 1. let a and b be positive integers (A > B), p be the greatest common divisor of a and b, and q be the least common multiple of a and b, then the size relationship of p, q, a and b is () A.P ≥ Q ≥ A > B.Q ≥ A > B ≥ P C.Q In the following statements, () a. (a+) 2 is a positive number and b. a2+ is a positive number, which is correct. Then ac2>bc2.b: if ac2>bc2, then a > B. Two conclusions () A. A and B are both true. B. A is true, B is not true. C. A is not true, B is true. D. A and B are not true. 5. If a+b=3, A > B. =. And a+2b+3c=m and a+b+2c=m, then the relationship between b and c is () A. They are reciprocal B. They are reciprocal C. They are equal to D. It is impossible to determine 7. The sum of two polynomials of degree 10 is () A.A.A.20th polynomial B. 1 0th polynomial C.100th polynomial D. Not higher than10th polynomial 8. If it is in1,2, 3, Let A, B, C and D all be natural numbers, a2+b2=c2+d2, and prove that a+b+c+d must be a composite number.