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What do Chinese Academy of Sciences advanced numbers A and B refer to? Is it the same as the high numbers one, two and three in the national unified proposition?
A and B are independent propositions of Chinese Academy of Sciences, and the difficulty of A and B is different. Those who require advanced mathematics, take an A.

Obviously, it is different from the 123 national proposition.

The real questions can be bought in markets all over the country. According to the review book compiled by the outline, A and B only have a broad outline, so it is difficult to get the real questions.