Helen is a twenty-four-year-old lady. She is a teacher. She works in a primary school. In her office, there are four English teachers. They are all young. So they are good friends. They like singing and dancing. Helen can sing very well, but she can’t dance. She goes to visit her grandparents every Sunday. She often plays cards with her grandfather. Her grandma cooks nice food for her. Helen is very happy because she can have chicken soup on Sundays. It’s her favourite.
1.Helen has some friends in her office. (2.There are three old teachers in Helen’s office. (
3.All the teachers can sing and dance well. (
4.Helen goes to see her grandparents every Saturday. (
5.Helen likes noodles best. (
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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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