A.利用稀释涂布平板法准确估计菌落数目的关键是有恰当的稀释度 |
B.若要判断选择培养基是否起到了选择作用需要设置未接种的牛肉膏蛋白胨培养基作为对照 |
C.该实验每隔 24h 统计一次菌落数目,并以菌落数目稳定时的记录作为结果 |
D.用以尿素为唯一氮源且添加了酸碱缓冲剂的培养基来培养该细菌后会使酚红指示剂变红 |
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