33. In 1970s, the relaxation of Sino-US relations was an important achievement of China's diplomacy. Both China and the United States agree that the principle of "One China" is the basic prerequisite for improving relations and ultimately promoting the normalization of relations between the two countries.

Remarks: According to the textbook, the first half of this question is definitely correct, while the second half is more difficult and controversial. Many years ago, people taught old textbooks and classic old test questions, all of which had multiple-choice questions with similar examination angles, as follows:

25. 1972, the first prerequisite for improving Sino-US relations is ()

A. Nixon's visit to China B. The United States accepts the Five Principles of Peaceful Coexistence C. China resumes its seat in the General Assembly D. The United States recognizes that there is only one China.

Therefore, many netizens think that this question correctly chooses A, but according to the scanned version of the standard answer circulated on the Internet, the correct answer should be B.