(1)在“制作并观察洋葱鳞片叶内表皮细胞临时装片”实验中,某同学规范操作,在实验过程中看到了如图所示的几个视野,为把B中物像移到视野正中央,应该把装片向
(2)用显微镜观察小鱼尾鳍内的血液流动时,红细胞单行通过的血管是
(3)在观察蚯蚓的实验中,必须保持蚯蚓体表湿润,主要是为了使蚯蚓能够正常
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