下图为2017年长三角城市群流入人口的主要来源分布图,图中线条宽度与流入人口占比相关,线条越宽占比越高。完成下面小题。
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1.长三角城市群流入人口主要来源于我国四大地区中的( )
A.东部地区 | B.中部地区 | C.西部地区 | D.东北地区 |
①工资水平②空间距离③土地价格④环境质量
A.①② | B.②③ | C.③④ | D.①④ |
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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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