A.从雄性奶牛中采集到的成熟精子遇到卵子即可进入卵子内 |
B.在体外完成受精后的受精卵,将其植入子宫即可完成着床 |
C.随着卵裂的进行,卵裂球细胞的体积变小,卵裂球的体积和有机物总量显著增加 |
D.在含有经辐射处理的胚胎成纤维细胞的培养体系中,胚胎干细胞不易发生分化 |
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