听力原文:W: What do you think of the objective of monetary policies? M: It is to maintain the stability of currency and thereby promote economic growth. Q: What is the objective of monetary policies? (12)
A.
Expanding business.
B.
Maintaining the stability of currency.
C.
Decreasing economic growth.
D.
Supervising the banking system.
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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.