The utility model relates to a variable form sofa which comprises a base, cushions, backrests and side seats, wherein the cushions, the backrests and the side seats are arranged on the base. The variable form sofa is characterized in that the sofa has a plurality of cushions and backrests...
题目务型阅读海伦的生日(It's Helen's birthday today. All her friends are at her home. Theybring a lot of things for her party. They show their things to each other. )Nancy: What's in your hand, Yang Ling?Yang Ling: It's a tin of chicken. Do you like...
选择合适的导管:不同类型的导管有不同的材质和尺寸,选择合适的导管可以减少不适和疼痛。一般来说,柔软的导管比硬的导管更舒适,而细的导管比粗的导管更容易插入。此外,选择无刺激的导管材料也有助于减少不适感。 2. 使用局部麻醉:在插入导管之前,可以使用局部麻醉来减轻疼痛。常用的...
doi:10.1007/BF02582036U-Hang KiNam-Gil Kim数学学报(英文版)