To establish a FAAS method to determine sodium in diosmin heptakis hydrogensulfate sodium.
建立火焰
吸收光谱法测定地奥明七硫酸酯钠中钠含量
方法。
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60秒 2017
4月合集
最终领域
六级听力真题精听 

9月合集
生英语 2023
8月合集
7月合集 You know, we made a film... we made a film about the man who created the atomic bomb, and for better or for worse, we're all living in Oppenheimer's world, so I would really like to dedicate this to the peacemakers everywhere.
我们拍了一部关于原子弹制造者
电影,无论好坏与否, 我们都生活
奥本海默
世界里,所以我真
很想把这部电影献给世界各地
和平缔造者。
生英语 2018
5/6月合集 And this week, the Israeli leader said his country has evidence that Iran lied about suspending its nuclear program and that it's keeping an atomic archive of blue prints, charts and videos concerning nuclear weapons at a secret location.
这周,这位以色列领导人说,他
国家有证据表明伊朗
暂停其核项目上撒谎,并
一个秘密地点保存了有关核武器
蓝色印刷品、图表和视频
原子档案。
Like caffeine, theobromine is a type of alkaloid, which is a huge class of molecules that generally contain rings with at least one nitrogen atom in them, and alkaloids often have physiological effects on humans and other animals.
和咖啡因一样,可可碱属于生物碱
一种,生物碱是相当大
一类分子,一般来说它
环中会包含至少一个氮原子,生物碱通常会使人类及其他动物产生生理作用。