55.有一質點在直線上移動，其在 0-14 s 間之加速度如【圖 55】所示，試求在此 14 s 區間，速度之變化量為多少 m/s？(A) -8 (B) +8 (C) -24 (D) +16

5. The cholesterol associated with animal cell membranes (A) is attached to membrane proteins and extends into the watery environment surrounding the cell. (B) helps to keep phospholipids from being too close to one another. (C) is an abnormality resulting from a diet high in cholesterol. (D) helps solidify the membranes when the room temperature is below freezing.