单项选择题

字母“G”的打法是:食指伸直,指尖(),其余四指握拳,手背朝外 
The method of typing the letter "G" is: stretching the index finger, with the fingertips (     ), and clenching the other four fingers with the handback outward

A.向左 B向左 C向上 D向下
left     B. right    C. up    D. down
B.向右
right    C. up    D. down
C.向上 D向下
  up    D. down
D.向下
down
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