A.白鹭用肺呼吸气囊辅助呼吸,鳜鱼用鳃呼吸,白鹭的胚胎发育方式是卵生 |
B.桃花的子房发育成果实,受精卵发育成种子 |
C.相对于白鹭和鳜鱼,桃树的细胞结构没有线粒体 |
D.白鹭、桃树、鳜鱼及西塞山前的所有生物构成了一个生态系统 |
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