A.常温下鲜梨含水量大,环境温度较高,呼吸代谢旺盛,不耐贮藏 |
B.密封条件下,梨呼吸作用导致O2减少,CO2增多,利于保鲜 |
C.冷藏时,梨细胞的自由水增多,导致各种代谢活动减缓 |
D.低温抑制了梨的酚氧化酶活性,果肉褐变减缓 |
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