發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : Adsorption of zinc ion on leonardite prepared from coal waste