A.提高培养基中细胞分裂素与生长素间含量的比值可促进愈伤组织分化出根 |
B.用适宜浓度的生长素类似物处理未受粉的番茄雌蕊,可获得无子番茄 |
C.用适宜浓度的赤霉素处理休眠的种子可促进种子萌发 |
D.利用成熟木瓜释放的乙烯可催熟未成熟的柿子 |
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