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           _    _     _____    _    _             
  ____    | || | ||  |__  //  | || | ||     ___   
 |    \\  | || | ||    / //   | || | ||    /   || 
 | [] ||  | \\_/ ||   / //__  | \\_/ ||   | [] || 
 |  __//   \____//   /_____||  \____//     \__ || 
 |_|`-`     `---`    `-----`    `---`       -|_|| 
 `-`                                         `-`

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發送短信 : Cognitive skill achievement of college freshmen using Piaget's logical operations in mathematics