长江干流流经我国11个省(自治区、直辖市),支流众多,全长6300多千米。读“长江水系图”(如下图),完成下面小题。
1.毛泽东在《沁园春·长沙》中写道:“独立寒秋,湘江北去,橘子洲头,看万山红遍,层林尽染……”图中数字表示湘江的是( )A.① | B.② | C.③ | D.④ |
①中游地区围湖造田②中下游地势低平
③支流众多,雨季涨水集中④流域内降水丰沛
⑤上中游砍伐森林,破坏植被
A.①②③ | B.②③④ | C.①⑤ | D.③④⑤ |
同类型试题
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
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