“无处理”组叶面温度 | “涂凡士林”组叶面温度 | |
照射前 | 27.2℃ | 27.0℃ |
照射10分钟时 | 38.2℃ | 41.7℃ |
照射20分钟时 | 35.2℃ | 42.9℃ |
A.能提高叶面温度 | B.与叶面温度变化无关 |
C.能降低叶面温度 | D.与气孔开闭无关 |
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