Hello, I am Tim. I'm seven. I have a brother, Mike. He is ten. This is Helen. She's my sister. She is nine. Who is that girl? That's Lucy. She is nine, too. She's Helen's friend. We love each other.
1._________ is 7. ( )A.Tim | B.Mike | C.Helen |
A.7 | B.9 | C.10 |
A.7 | B.9 | C.10 |
A.Mike | B.Helen | C.Lucy |
A.sister | B.classmate | C.friend |
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同类型试题
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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
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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
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