Read the text carefully and decide whether the following statements are true or false. 4. Peasants in Latin America, North Americans and Chinese all believe in the dichotomy of yin and yang .
A.
正确
B.
错误
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【简答题】What is the pH of a 0.025mol·L -1 solution of ammonium acetate at 25℃? of acetic acid at 25℃ is 4.74, of the ammonium ion at 25℃ is 9.25, is 14.00.