發送短信

數:

提供者:

CAPTCHA:

  ______    ______   _____     __   __    ______  
 /_____//  /_   _// |  __ \\   \ \\/ //  /_   _// 
 `____ `    -| ||-  | |  \ ||   \ ` //     | ||   
 /___//     _| ||_  | |__/ ||    | ||     _| ||   
 `__ `     /_____// |_____//     |_||    /__//    
 /_//      `-----`   -----`      `-`'    `--`     
 `-`

Please enter what you see:

發送短信 : Mobile and Internet Usage, Institutions and the Trade Balance: Evidence from African Countries