温室大棚 | A | B | C |
温度 | 20℃ | 20℃ | 30℃ |
二氧化碳浓度 | 0.03% | 0.1% | 0.1% |
(2)若要探究二氧化碳浓度对番茄产量的影响,应选择
(3)经过探究,同学们认为夜晚适当
(4)除了控制温度、二氧化碳浓度,请你提出一项能够提高番茄产量的措施
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