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【简答题】
二氧化氮（NO2）的性质是什么？
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【单选题】Part ADirections: Read the following four texts．Answer the questions below each text by choosing A, B, C or D．(40 points)Children attending schools located in high-traffic zones have a 45 percent incr...
A.
There exists traffic-related pollution.
B.
Schools are located in heavy-traffic areas.
C.
Children are frequently exposed to pollution.
D.
The vehicles increase rapidly.
【单选题】根据《环境空气质量标准》，二氧化氮的年、日均的三级浓度限值分别为( )和 ( )mg/m3。
A.
0.05 0.10
B.
C.
D.
B．0.10 0.15
E.
C．0.08 0.12
F.
G.
H.
D．0.04
I.
0.08
相关题目：
【单选题】Part ADirections: Read the following four texts．Answer the questions below each text by choosing A, B, C or D．(40 points)Children attending schools located in high-traffic zones have a 45 percent incr...
A.
There exists traffic-related pollution.
B.
Schools are located in heavy-traffic areas.
C.
Children are frequently exposed to pollution.
D.
The vehicles increase rapidly.
【单选题】根据《环境空气质量标准》，二氧化氮的年、日均的三级浓度限值分别为( )和 ( )mg/m3。
A.
0.05 0.10
B.
C.
D.
B．0.10 0.15
E.
C．0.08 0.12
F.
G.
H.
D．0.04
I.
0.08
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