题目内容

在显色吸收液瓶前接一内装三氧化铬—石英砂(氧化剂)管，当用空气采样器采样时，气样中的NO在氧化管内被氧化成NO2和气样中的NO2一起进入吸收瓶，与吸收液发生吸收、显色反应，于波长540—545nm之间处，用标准曲线法进行定量测定，其测定结果为空气中NO和NO2的总浓度CNOx。

A. 对
B. 错

查看答案

搜索结果不匹配？点我反馈

更多问题

I was thinking about taking photography as a hobby.

A. in
B. with
C. up
D. on

The court was presented withevidence that she'd murdered her husband.

A. comfortable
B. communicated
C. compelling
D. compulsory

A big part of has to do with making healthy dietary choices and knowing when to step away from the snack cabinet.

A. drug control
B. weight control
C. mood control
D. birth control

If yousomeone into something, you gently persuade them to take a particular action.

A. bridge
B. nudge
C. grudge
D. gauge