从农作物的种植、收获、加工到制盐、糖、油的方法,从砖瓦、瓷器、纸张的生产到制衣、染色技术,从五金采冶、车船制造到珠玉、宝石工艺等,都做了详细记载,并配有插图。
①可用于指导农业生产
②有助于将农产品转化为商品
③可用于指导手工业生产
④该书图文并茂
A.①② | B.③④ | C.①②③ | D.①②③④ |
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