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My name is Lily. This is our new classroom. It’s very big. You can see a blackboard, a computer, four fans, six lights, many desks and chairs. And I have a new schoolbag. It’s yellow and it’s so heavy. I have a maths book, a Chinese book and five notebooks in it. Where is it? Oh, it’s on the floor.
1．The classroom is not so big.2．There are four fans and lights in the classroom.
3．The schoolbag is yellow and orange.
4．I have many notebooks in the schoolbag.
5．The schoolbag is on the floor.
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
