汉语字母 “ê”的打法是：用“E”的指式，手指（）两下 The method of typing the Chinese letter "ê" is to use" E" finger type, and the finger can (    ) twice.
A、上下摇动 shake up and down  B
B、前后摇动  shake back and forth  
C、向左摇动 shake left   
D、向右摇动shake right