六月初,小麦黄了。看不到边的绿色的庄稼地,有了好些黄灿灿的小块,这是麦地。村东边的小池子里,菱角开着小小的金黄色的花朵,星星此文转自斐.斐课件.园FFKJ.Net点点的,漂在水面上,夹在青青的蒲草中间,老远看去,连成一片。燕子唧唧地叫着,在天空中飞来飞去,寻找吃的东西,吃完了又停在房檐下,刷洗它们的羽毛。
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