A.鼠妇属于节肢动物,但不是昆虫,它的身体和附肢也分节,体表有外骨骼 |
B.华枝睾吸虫背腹扁平,有三个胚层,其幼虫主要寄生人体内 |
C.两栖动物中的蟾蜍有大型毒腺,所分泌的毒液能制成中药蟾酥 |
D.兔与草食性相适应的结构特点是消化道很长,盲肠特别发达 |
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