發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : An economical ultrasonic-assisted extraction for the spectro- photometric determination of anionic surfactants