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Miss Fox: Let’s begin our class. First, look at these two pictures on the blackboard. Here are two animal friends. What are they?
Bobby: They’re birds.
Miss Fox: Yes. One is a swallow（燕子）, and the other is a sparrow（麻雀）. Now who can tell us which the swallow is and which the sparrow is? Bobby, can you try?
Bobby: Sorry, Miss Fox, I can’t.
Miss Fox: Who can try?
Sam: I can, Miss Fox. The swallow is beside the sparrow and the sparrow is beside the swallow.
1．Miss Fox is teaching her students Maths. （______）
2．The students can see two animal friends. （______）
3．Bobby doesn’t know which the swallow is. （______）
4．Sam knows which bird the swallow is. （______）
5．Miss Fox is not happy with her students. （______）
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
