A.图一中实验的变量是含氮、磷、钾的无机盐 |
B.图二中将萌发的种子换成新鲜的幼苗,则该实验必须在光下进行 |
C.经暗处理的植物如图三设计,再光照数小时及脱色漂洗加碘后,变蓝的部位是绿色部分b |
D.图四“模拟保护色形成过程”的实验中,那些与背景颜色相同的小纸片不会被“捕食” |
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