搜题请搜索小程序“爱下问搜题”
问题 单项选择题

某FID色谱仪，测定含苯1.00%、甲苯1.00%的标准样品，峰面积分别为苯1500、甲苯1560，那么，甲苯相对于苯的相对校正因子为（）。

A、1/1500

B、1/1560

C、1560/1500

D、1500/1560

答案

参考答案：C

单项选择题

The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.

These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, and sentence construction. Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.

Having accounted for only 13 percent of the student body at Northlake High, students who attended Megalopolis Middle School dominate the Northlake High student government.（）

A. Having accounted for

B. With

C. Despite having been

D. Although accounting for

E. As
查看答案
问答题 简答题

半导体导电特性有哪些？
查看答案