题目内容

Which compound is with little or no FID response？

A. CH3OH
B. CH4
CO2
D. CH3CHO

查看答案

搜索结果不匹配？点我反馈

更多问题

使用FID检测器时，应选用下列哪种气体作载气？

A. 氢气
B. 氦气
C. 氮气
D. 氩气

在气相色谱分析中，用于定性分析的参数是（）

A. 保留时间
B. 半峰宽
C. 分离度
D. 峰面积

气化室的作用是将样品瞬间转化为

A. 固体
B. 液体
C. 气体
D. 水汽

报价信例题训练June 18, 2019Dear Mr. John Smith,We were very ____ （1. 感激的） to receive your letter dated June 15th which （2. 询问） shirt ordering.I am the sales manager of ABC Clothing Company. The （3. 单价） of the shirt depends on the _（4. 订购数量）.If the quantity is less than 100 pieces, the （5. 单价） is 80 yuan and if more than 100 pieces (including 100 pieces), the （6. 单价）will be 75 yuan.Our products are _（7. 款式新颖） and （8. 价格公道）. If you need more information about the products, you can visit our website (www. ABCclothing.com). In addition, our product （9. 价目表）is enclosed with the letter. We are willing to provide thoughtful service for you.Thank you again for your __（10. 询问） and I am looking forward to your reply ASAP.Yours faithfully,Wang Hua