Test analysis: Truth is concrete, objective and conditional. Romain rolland's famous saying tells us that truth is objective, the existence of truth is independent of human will, and truth is relative, so we must constantly pursue truth in practice. (3) (4) statement error, can't confuse the boundaries between truth and falsehood. People can know the truth and think that "people's understanding will never reach the truth, so it is impossible to possess the truth." This is agnosticism, and the correct answer is B.

Comments: Candidates can easily rule out 4, so the answer is between AB, which means that 1 is correct. Candidates may not be able to accurately judge whether 3 is correct, but they can accurately judge whether 2 is correct, so the answer is 12.