下图示意南水北调中线工程丹江口水库至北京段输水干渠线路。据此完成下面小题。
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1.该输水干渠修建的影响是( )
A.缓解库区周边的土地盐渍化 |
B.缓解北方地区的地面下沉 |
C.彻底解决华北地区缺水问题 |
D.加剧丹江口水库防洪压力 |
A.地形地质条件复杂 | B.沿线的地质灾害多 |
C.移民的工程量巨大 | D.可以调用的水量少 |
A.调节水资源空间分布不均 | B.保证华中的电力供应 |
C.调节水资源时间分布不均 | D.实现汉江全流域治理 |
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同类型试题
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
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