The environmental balance among ecological communities is exceedingly complex.A.almostB.su
The environmental balance among ecological communities is exceedingly complex.
A.almost
B.successfully
C.extremely
D.rarely
The environmental balance among ecological communities is exceedingly complex.
A.almost
B.successfully
C.extremely
D.rarely
A、Only One Earth
B、Environmental Pollution Control Technology
C、Global Environmental Issues
D、Silent Spring
Most of the environmental problems are man-made.()
A.to prevent pollution by legislation, economic incentives and persuasion
B.to arouse public awareness of the importance of environmental protection
C.to take radical measures to control environmental pollution
D.to improve the quality of life by enforcing environmental standards
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