A.图甲所示成功的关键是接穗和砧木的韧皮部紧密结合在一起 |
B.图乙所示昆虫的发育方式与蝗虫相同,都属于完全变态发育 |
C.图丙鸟卵的结构中,胚胎发育的部位是[⑤]胚盘,其内含有细胞核 |
D.图乙中的生物进行体内受精,丙的整个发育过程在体外完成 |
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