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【多选题】
Which helps to approach an appropriate price?()
A.
Threshold for a real impact on behavior 30 to 40 dollars per ton
B.
Summing up investigations range between 18 and 330 dollars per ton
C.
Willingness-to-pay method
D.
Extreme marginal costs when going over a tipping point
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举一反三
【单选题】Why do springs emit a distinctive odor?
A.
The springs contain various microelements.
B.
There are rotten creatures in the springs.
C.
There are waste materials on the surface of springs
D.
The springs release poisonous gas.
【单选题】Using dynamic programming method to solve maxz=8x12+4x22+x33; x1+x2+x3<=20,x1,x2,x3>=0 ,the optimal solution ( )
A.
x1=0,x2=0,x3=20
B.
x1=0,x2=20,x3=0
C.
x1=20.x2=0,x3=0
D.
x1=10; x2=10; x3=0
【多选题】Which are important sources of renewables?()
A.
Fossil fuels
B.
Biomass
C.
Terrestrial heat
D.
Nuclear energy
【多选题】Advantages of an energy turnaround are()
A.
Consequences of climate change disappear completely.
B.
New sustainable economic growth
C.
Decentralization reducing vulnerability
D.
Cheap, sustainable, reliable energy for future generations
【单选题】What are the two springs for bathing?
A.
The Big Boiling Pot and Spectacle Spring
B.
The Bath Valley and The Beauty Pond
C.
The Frog Mouth and the Lion Head
D.
The Beauty Pond and Drum-Beating Spring
【单选题】When doing Skewed Crossing, four people form a （ ）position.
A.
square
B.
rectangle
C.
rhombus
D.
circle
【单选题】How did the springs in the "Hot Sea" come into being?
A.
Water is heated up by the local people.
B.
Water in the neighboring rock heats up after volcano eruption and pours out of the rock.
C.
Water on the surface permeates deep into the earth's crust and spews out from the fracture because of high pressure.
D.
Water comes from magma.
【多选题】Energy and water are crucial factors for sustainable development, and the role of energy lies in()
A.
Availability of drinking water
B.
Water waste
C.
Transport or treatment
D.
Disposal or reuse
【单选题】Why is Hot Sea Scenic Area worth visiting?
A.
It is a big tourist resort.
B.
Lots of people pay a visit to this place.
C.
It is beautiful here.
D.
The springs are well-preserved and vary in size, temperature, shapes, which are the remarkable landscapes in Tengchong.