Preparation of salicylic hydrazide . Controlling material mole ratio and the product recrystallization is the key.水杨 酰肼的制备控制原料的摩尔比、产物的重结晶是关键.A new method for determining hydrazide group introduced to polymethyl acrylate ...
另一些花粉母细胞在末期具有微核.There were micronucleus at telophase in another pollen mother cells.目的探讨放射工作人员外周血淋巴细胞染色体畸变和微核的变化.Objective To observe chromosomal aberrations and micronucleus in peripheral blood lymphocyte.本文采用姐妹染色单体交换 (...
On the condition of thermal contact metamorphism, clay minerals in coal are changed into andalusite.无烟煤中红柱石是煤中粘土质矿物经热接触变质作用形成的.A paper bird cannot stand the strong wind, and a clay figurine cannot bear the heavy rain.纸鸟经...
Pink with faint blue, crown _ shaped ; lateral flowers spars, spreading, sterile.粉色,微蓝, 皇冠型.株型开张, 花朵侧开.叶片长尖而稀.吐芽少. 无结实能力.He always made sure that any cuts were protected by sterile dressings.他总是坚持要用无菌纱布包扎伤口。All diploid s...
需高效能的印刷油墨,并带有颜色, 网板及线性操作.Speed and High efficiency inking with color, Halftones and line works.专用网板印刷 、 展板, 彩色标志、标牌,电脑刻字.Advertising : professional screen printing, board, color sign , signboard and computer lettering.广告...
Suddenly she dropped the quill as a wild happiness flooded her.她突然感到一阵无限的快乐,当即丢开了手里的鹅毛笔.She dipped a quill in ink, then began to write.她将羽毛笔在墨水里蘸了一下，随后开始书写。Set of clear crystal inkwell with quill, book, diploma and gradu...