A.用镊子撕取的外表皮,若带有少量的叶肉细胞仍可用于实验 |
B.将外表皮平铺在洁净的载玻片上,直接用高倍镜观察细胞状态 |
C.为尽快观察到质壁分离现象,应在盖玻片四周均匀滴加蔗糖溶液 |
D.实验观察到许多无色细胞,说明紫色外表皮中有大量细胞含无色液泡 |
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