A.施用草木灰(有效成分为K2CO3)可促进植物的生长、增强抗倒伏能力 |
B.农药施用后一定不会通过农作物、农产品等发生转移 |
C.随意丢弃聚乙烯制品(如食品包装袋)不会产生“白色污染” |
D.由于钢铁在空气中会发生锈蚀而损耗,故废旧钢铁制品不需回收利用 |
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