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【单选题】Water Resource Humanity uses a little less than half the water available worldwide. Yet occurrences of shortages and droughts (干旱) are causing famine and distress in some areas, and industrial and agr...
A.
build big lakes to store water
B.
construct big pumping stations
C.
build small and cheap irrigation systems
D.
channel water from nearby rivers to cropland
【单选题】下列属于生物多样性间接使用价值的是 A.“两个黄鹂鸣翠柳,一行白鹭上青天”,激发了人们的文学艺术创作灵感 B.野生生物相互依存、相互制约,共同维系生态系统的稳态 C.生物多样性为培育农作物、家畜和家禽新品种提供不可缺少的基因库 D.科学家根据苍蝇平衡棒的导航原理研制了新型的导航仪
A.
1
B.
2
C.
3
D.
4