Hello! I have a pen pal. His name is Xu Wei. He is twelve years old. He
A.live in | B.lives in | C.lives on |
A.read | B.reads | C.reading |
A.be | B.is | C.are |
A.hospital | B.factory | C.post office |
A.in | B.by | C.take |
A.like | B.likes | C.is like |
A.teach | B.teaches | C.to teach |
A.on | B.in | C.by |
A.clean | B.cleaning | C.cleans |
A.in | B.for | C.on |
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