Warning: file_put_contents(/home/www/wwwroot/zidian/69228.com/cache/7f008f90edb49460fe370101d6330b43.txt): failed to open stream: No space left on device in /home/www/wwwroot/zidian/69228.com/index.php on line 55 久久一本人碰碰人碰,日韩国产成人精品视频
Gemini surfactant is a new type of surfactant, with molecules made up of two amphiphilic moieties covalently connected at the level of the head group by a spacer. 雙子表面活性劑是一類(lèi)新型的表面活性劑，其分子由化學(xué)鍵通過(guò)聯(lián)接基團(tuán)將兩個(gè)單鏈表面活性劑的離子頭聯(lián)接構(gòu)成。