32.What is the function of the "electrolyzer system"?
A.To produce a substance.
B.To test chemicals in plants.
C.To change compositions of plants.
D.To detect plants'amount of water.
33.What can we expect of artificial photosynthesis in the future?
A It will take the place of sunlight.
B.It may help fight the food crisis.
C.It will speed up energy production.
D.It can produce food of better quality.
34.What can be inferred from Robert Jinkerson's words?
A.Intensive agriculture is becoming popular.
B.Agricultural lands should be expanded.