1.书是钥匙,能开启智慧之门;书是阶梯,能帮你登上理想的梯子;书是
2.在漆黑的夜里,飞机是怎么做到安全飞行的呢?原来是人们从蝙蝠身上得到了启示。(仿写句子)
3.很久很久以前,天和地还没有分开,宇宙混沌一片,像个大鸡蛋。(仿写句子)
4.触着墙的,细丝和小圆片
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