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Miss Cat and Mr. Dog are living (住) in an old house (房子). They often (常) play together. Miss Cat is white and 1． likes (喜欢) fish, but she doesn’t like fruits. Mr. Dog is black and 2． likes bones, and he doesn’t like fruits either. The 3． house has (有) a door. The door has two holes (洞). The hole isn’t big. The 4． is small and thin and she can go through (穿越) the hole, but the dog is big and 5． and he sometimes (有时) can’t (不能). So the dog only can go though the door when it is open (开着的).
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
