题目

  The newspaperman did not understand what Johnson meant. In his newspaper he reported that Johnson was seventy-five and had a daily injection in his neck. Within a week Johnson received thousands of letters from all over Britain, asking him for the secret of his daily injection. 56. Johnson became a rich man through ___________.    A. doing business  B. making whisky  C. cheating  D. buying and selling land 57. The gift of money to the school suggests (暗示) that Johnson ___________.    A. had no children                B. was a strange man    C. was ve11．设M，N是△ABC所在平面内不同的两点，且$\overrightarrow{AM}$=$\frac{1}{2}$（$\overrightarrow{AB}$+$\overrightarrow{AC}$），$\overrightarrow{AN}$=$\frac{1}{3}$$\overrightarrow{AB}$+$\frac{2}{3}$$\overrightarrow{AC}$，则△ABM与△ABN的面积比$\frac{{S}_{△ABM}}{{S}_{△ABN}}$为（　　）A．$\frac{3}{4}$B．$\frac{2}{3}$C．$\frac{3}{2}$D．$\frac{1}{3}$