23.新凱因斯學派認為貨幣政策能影響實質經濟，其關鍵原因在於： (A)完全理性預期 (B)價格或工資存在僵固性 (C)完全競爭市場 (D)長期貨幣中立

3. Which of the following is not determined by the principal quantum number, n, of the electronin a hydrogen atom?(A) the minimum wavelength of the light needed to remove the electron from the atom.(B) the energy of the electron(C) the shape of the corresponding atomic orbital(s)(D) the size of the corresponding atomic orbital(s)(E) All of the above are determined by n.