下边的菜谱有2个荤菜,如果想让菜谱的荤、素菜一共有6种不同的搭配方法(一荤一素),应该准备( )样素菜,请选择素菜并将序号填写在菜谱上。(素菜选择:①烧芸豆、②韭菜炒鸡蛋、③炖茄条、④炒瓜片、⑤土豆丝、⑥炒芹菜)
菜谱 荤菜:鱼 排骨 素菜: |
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