A.合理使用斐林试剂的甲液、乙液和蒸馏水,也能够用于鉴定蛋白质实验 |
B.选用豌豆的叶肉细胞,能够观察到处于有丝分裂中期的染色体形态 |
C.在鸡蛋清中加入食盐能析出絮状物,是因为破坏了蛋白质分子的空间结构 |
D.观察菠菜叶片临时装片时,发现叶绿体带动细胞液呈逆时针流动 |
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