CO₂<br/>is invisible, tasteless and odorless, which has helped keep the truth<br/>about what it is doing to our climate out of _______<br/>and out of mind. A: kilter B: trouble C: sight D: slight

在做废气分析时，对各气体的吸收顺序正确的是（）。 A: CO→O→CO B: CO→CO→O C: CO→CO→O D: O→CO→CO

MFA吸收CO2过程中对于（）是惰气。 A: CO，CO，H B: CO、H、N C: HS、CO、N D: HS、CO、CO

下列关于CO变换率的计算正确的是（）。 A: 进口CO量/出口CO量 B: 出口CO体积百分含量/进口CO体积百分含量 C: 进口CO体积百分含量/出口CO体积百分含量 D: （进口CO量-出口CO量）/进口CO量

【单选题】3 . Aron ______ water five days later. A . ran out B . used out C . ran out of D . used out of A. A ． ran out B. B ． used out C. C ． ran out of D. D ． used out of

下列关于CO变换率的计算错误的是（）。 A: （进口CO量-出口CO量）/进口CO量 B: 变换了的CO与反应前气体中CO之比 C: 进口CO量/出口CO量 D: 出口CO体积百分含量/[进口CO体积百分含量（1+出口CO体积百分含量）]

Howabout_______for a walk? A: go out B: went out C: going out D: will go out

The bookhis experience in India. A: came out in B: came out of C: came out at D: came out with

There was a power cut and all the lights _____. A: went out B: go out C: died out D: made out

I learned to ______the background noise. A: let out B: get out C: leave out D: tune out