發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : Homogeneous acetylation of water-soluble cellulose acetate with ionic liquid