A.要构成一个完整的生态系统,除了图中所示成分外,还需加入的成分是分解者和非生物环境 |
B.该食物网共有4条食物链 |
C.在“农作物→鼠→蛇”这条食物链中,若大量捕捉蛇,鼠的数量会先增多后减少 |
D.该食物网中最长的食物链是:农作物→昆虫→蜘蛛→青蛙→蛇 |
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