单词：pentane
[化] 戊烷
methane or paraffin series. They are colorless, volatile liquids, two
of which occur in petroleum. So called because of the five carbon atoms
in the molecule.
pentane的用法和样例：
例句
- Thermometers are filled with pentane or alcohol.温度计盛有戊烷或酒精。
- Identification of retention time can be accurately obtained using a pentane peak as a standard.可以用戊烷峰来计算其它峰的保留时间。
词汇搭配
- pentane plus戊烷以上的烃...
- pentane thermometer戊烷温度计
单词：pentane 相关文章
CHAPTER TWO Going to School When I woke up, a doctor was carrying me to my own bedroom. It was good to be back in my room, which had a warm fire and candlelight. I was also happy to see Dr. Lloyd, who was a very kind man. He was the doctor that helpe
简爱
CHAPTER FIVE Mr. Brocklehursts Visit It was hard to get used to the rules at Lowood, and to the extremely cold, hard winter. In January, February and March there was deep snow, but we still had to go outside for one hour every day. We had no warm boo
简爱
CHAPTER FOURTEEN I Return to Gateshead The next day I got a letter from Gateshead. There was much trouble and sadness there. My cousin, John Reed, had spent all his money and most of his mothers. he had been in prison most of his life. He owed many p
简爱
CHAPTER NINE Mr. Rochesters Secrets After a little time at Thornfield, I knew that Mr. Rochester and I were becoming friends. He was beginning to trust and like me. Many times, when we walked in the garden or sat by a fire in the evening, he told me
简爱
CHAPTER EIGHT Life with Mr. Rochester Now that Mr. Rochester had returned , Thornfield hall was very busy. Many people came to visit his and talk about business. Adele was too excited to study. That evening we had tea with Mr. Rochester. Of course, t
简爱
PART THREE---- A YOUNG WOMAN AT THORNFIELD CHAPTER SEVEN Mr. Rochester The house where I was to work was called Thornfield. It was a large house in the country. After a days journey, I arrived at the house. Mrs. Fairfax, who came out to meet me, was
简爱
CHAPTER FOUR My New Friend The next morning we got up in the dark. In all the rooms it was as cold as ice. This time the porridge was not burned, but I still felt hungry because there was not enough. The girl I had spoken with yesterday was older tha
简爱
CHAPTER TWENTY-FIVE Happiness Ferndean Manor was a pretty old house in the forest. As I came near, the door of the house opened and Edward Rochester came out! As I watched him I felt both happy and sad. He looked as strong as before and his hair was
简爱
CHAPTER FIFTEEN The New Mrs. Rochester And so I began to travel back to Thornfield hall. While I was at Gateshead, Mrs. Fairfax had written to me. She told me that all the ladies and gentlemen had left, and that Mr. Rochester had gone to London to pr
简爱
CHAPTER TWENTY-ONE St. Johns Secret I had twenty village girls to teach. Some of them spoke in such a strong, country speech that I could barely understand them. Their words did not seem like the English language. Only three of the girls could read,
简爱
CHAPTER TWENTY Getting to Know the Rivers Family I stayed one month at Moor House. In that time, I came to love the little house, and the wild, beautiful fields around it, just like Diana and Mary did. We read books together and talked about them. Di
简爱
CHAPTER EIGHTEEN Mr. Rochesters Story Sometime in the afternoon I woke up from a long sleep. I felt weak when I stood up, because I had not eaten anything all day. When I opened my bedroom door, I saw Mr. Rochester. He was sitting in a chair outside
简爱
CHAPTER TWENTY-TWO I Am No longer Poor After St. John left me, it began to snow. It snowed all night and the next day. In the evening, I was sitting by the fire and had just begun to read when I heard a knock at the door. St. John came inside the hou
简爱
CHAPTER TWENTY-THREE My Past Returns I promised St. John that I would teach at the Morton school until Christmas. Then he could find another teacher. On the last day of school. St. John came to see me as I said goodbye to my students. I was sad to se
简爱
圣诞节快到了，听厌了Jingle Bell吗？就让Jenny和Connor来为大家推荐一些不一样的歌吧。这些都是欧美正当流行的热门圣诞歌曲哦！ 圣诞歌曲英语怎么说？ 圣诞歌曲除了Christmas songs，还可以说：
美国文化脱口秀
Mary, Did You Know? - Pentatonix Mary did you know take your baby boy 玛丽你知道吗你的圣子 Would one day walk on water 有一天会在水上行走 Mary did you know that your baby boy 玛丽你知道吗你的圣子 Would save our sons and d
2015最新精选英文歌曲
So awesome, right? Another example is Pentair. Pentair is a U.S. industrial conglomerate. 很棒，对吧？另一个例子是滨特尔。滨特尔是美国的工业集团。 And about a decade ago,they sold their core power tools business and reinve
TED演讲国际问题篇
与数字有关的英语词根总结 milli-【千分之一】例：milliampere（毫安）=milli（千）+ampere（安培） centi【百分之一】例：centimeter（厘米）=centi（百分之一）+meter（米） deci【十分之一】例：decibe
英语学习方法
用数学知识强化记忆 fourscore = four(4)score(20) 80 美国第16任总统林肯演说词第一句：fourscore and seven years ago， 那么，怎样才能记住 fourscore 这个词而终生不忘呢？只要我们了解了fourscore 的逻辑思维
实用英语
【大森】美国sing-off冠军Pentatonix最新纯人声超赞翻唱Calvin Harris和绵羊音Ellie Goulding热单《I Need Your Love》。人声合唱搭配五彩缤纷的mv剪辑，让人眼前眼花缭乱的同时身体也不禁随着节拍舞动起
好听的英文歌曲