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Xiao Lei and Liu Tao are good friends. Xiao Lei is eight years old. He’s thin. Liu Tao is ten years old. He’s strong. Xiao Lei has a new jacket. It’s blue. It’s eighty yuan. Liu Tao has a new shirt. It’s white. It’s forty yuan.
1．Xiao Lei is Liu Tao’s good friend.2．Xiao Lei is ten years old.
3．Liu Tao is strong.
4．Xiao Lei’s new jacket is eighty yuan.
5．Liu Tao’s new shirt is blue.
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
