单项选择题

The primary solution to environmental problems is ______.

A．to allow market forces to operate properly
B．to control consumption of natural resources
C．to limit the growth of the world population
D．to avoid fluctuations in prices

<上一题目录下一题>

热门试题

单项选择题

Fish resources are diminishing because ______.

A．no new substitutes can be found in large quantities
B．they are not owned by any particular entity(实体)
C．improper methods of fishing have ruined the fishing grounds
D．water pollution is extremely serious

单项选择题

Huff raised the house 2.7 meters off the ground on timber pilings in order to ______.

A．withstand peak winds of about 200 km/h
B．anchor stronger pilings deep in the sand
C．break huge sea waves into smaller ones
D．prevent water from rushing into the house