A.黑脸琵鹭龙骨突上附着发达的胸肌,牵动两翼完成飞行动作 |
B.黑脸琵鹭有发达的肺和气囊,可用肺和气囊进行气体交换 |
C.黑脸琵鹭是卵生,受精的卵中将来发育成雏鸟的部位是胚盘 |
D.黑脸琵鹭的体温高而恒定,且不会随环境温度的变化而改变 |
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