Soon people were making medicine with the salicin and selling it.Later scientists found out how to make salicin without using any plants at all. They called this new thingacetylsalicylic(乙酰水杨酸的) acid, and this is what aspirin is made from. Aspirin was first sold in 1899 bythe Bayer ...
Synthesis of Benzil from Benzoin by Oxidation.mp4 20:46 What is ring annulation! 12:36 Rubottom oxidation 29:20 Simmons-Smith Reaction 01:43 Total Synthesis 13, (±)-Silphinene 06:16 Synthesis of 3-epi-Hypatulin B 10:24 Aromaticity – Basics & types -Master Organic Chemistry - One ...
解析:后面的录音中记者说到这句话“even the tiny aspirin,that’s still aspirin(即使是药片很小的阿司匹林,它还是阿司匹林。)”,随后博士回答“That’s right.It can cause prob—lems”,由此可知,阿司匹林虽然药片很小,但还是会造成问题。因此选B项。 听力原文:W (6)Daniel, have you finished your research...
It would be difficult to count the number of such words, messages, letters, and reports put into mails or delivered by hand, but the daily figures must be extremely large. What is more, everyone who writes expects, or at least hopes whatever he writes will be read, from first word to...
Synthesis of Benzil from Benzoin by Oxidation.mp4 20:46 What is ring annulation! 12:36 Rubottom oxidation 29:20 Simmons-Smith Reaction 01:43 Total Synthesis 13, (±)-Silphinene 06:16 Synthesis of 3-epi-Hypatulin B 10:24 Aromaticity – Basics & types -Master Organic Chemistry - One ...
4. What is the best title for this passage? A. The Effects of Aspirin B. A Drug of Mystery C. A Medicine of Wonder D. The History of Aspirin 相关知识点: 试题来源: 解析 1. C 2. B 3. A 4. C 【导语】 这是一篇说明文。文章主要介绍了阿司匹林的历史、作用及其在医学上的广泛应用。
(advance) students.17.Theage children can go to school is seven.18.Thedog, sheused to be afraid, is her favourite animalnow.19.Thespeed Tomdrives his car is too high.20.Tomis the boy Iwent to the cinema together.21.Theclever boy made a hole in the wall, he could see what was ...
D. Because it made people feel cold 【2】Which answer to the following questions can be found out from the passage A. When did the Chinese start to eat bird brains B. Why do women like”Queen’s Secrets” C. What is the advantage of using pepper ...
This drink made their pains and fever go away, but no one knew why it helped. Then, in the1830s, scientists in England s 5 all the things that were in the bark of the white willow. They found out what thing in the plant stopped pain. Soon people were making medicine with this ...
content that is not good for teenagers.To deal with this problem,Douyin added a new function in April.It locks the app if someone uses theapp for over two hours a day.In the same month,the government asked companies to regulate(管理)these apps and get rid of bad videos.()1.What can...