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【单选题】
底层大气中的二氧化硫经过290nm-400nm光的照射,形成两种激发态,请问哪种激发态的能量最大A.
二氧化硫三重态
B.
二氧化硫单重态
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反馈参考答案：
举一反三
【简答题】Section D: 16 . What does the speaker talk about first in his speech? The speaker first gives about his company. 17 . What are the main products of the company? Clothing , and household products. 18. ...
【简答题】How long has the company been in business? Over_______________________________.
【单选题】How long has the man been working in this current position ?
A.
For two years.
B.
For three years.
C.
For five years.
D.
For six years.
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