离污染源的距离(km) | 0.1 | 0.5 | 1.0 | 2.0 | 4.0 | 8.0 |
动物类群(类) | 20 | 23 | 37 | 50 | 58 | 65 |
动物个体总数(个). | 367 | 656 | 750 | 1978 | 2490 | 3192 |
(2)比较不同取样点的动物类群或个体总数,距污染源越近,数量越
(3)分析每个取样点的数据,表明动物类群数越多,个体数量就越
(4)不同取样点数据的对比,说明
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