A.两柄动物与昆虫生殖发育方式均为有性生殖、变态发育,受精作用摆脱了对水的依赖 |
B.蝗虫为不完全变态发育;家蚕为完全变态发育,提高蚕丝产量,应延长蛹期 |
C.胎儿通过胎盘从母体获得氧气、养料并排出废物,胎盘承担出生后肺、小肠、肾脏等器官相应功能 |
D.卵白、卵黄能为胚胎发育提供营养;种子萌发至成熟开花为绿色开花植物的生活史 |
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