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【多选题】
How many levels are there in the Air Quality Index()?( )
A.
Four
B.
Five
C.
Six
D.
Seven
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Of the following environmental problems, the one that does not belong to environmental pollution is ( ).
A.
The noise from the rolling mill spread to the nearby residential area
B.
Waste water from the nitrogenous fertilizer plant is discharged into a nearby river
C.
The waste gas from the coking plant is discharged into the sky
D.
Serious water and soil erosion in the Huangtu Plateau region
【单选题】When we pronouncethe______, the shape of the mouth makes changes from thebeginning to the end. The most importantthing to remember is that______is much longerand stronger than ______. ______
A.
diphthongs, the first vowel, thesecond vowel
B.
diphthongs, the second vowel, thefirst vowel
C.
pure vowels, the first vowel, thesecond vowel
D.
pure vowels, the second vowel, thefirst vowel
【单选题】The Guangdong Silver Island Lake Paper-making Park combines( ) and paper making industry?
A.
Water treatment industry
B.
Biomass energy
C.
Coal fired power generation
D.
Hazardous waste treatment
【多选题】某项目从现在开始投资,2年内没有回报,从第3年开始每年获利额为A,获利年限为5年,年利率10%,则该项目利润的现值为()
A.
A×PVIFA10%,5×PVIF10%,3
B.
A×PVIFA10%,5×PVIF10%,2
C.
A×PVIFA10%,7-A×PVIFA10%,3
D.
A×PVIFA10%,7×-A×PVIFA10%,2