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Liu Tao: Oh, I can’t find（找不到）my crayon. Where is it?
Helen: Is it in your pencil case?
Liu Tao: No, it isn’t.
Gao Shan: Look! Your crayon is under your chair.
Liu Tao: Yes, this is my crayon. Thank you, Gao Shan.
1．Gao Shan can’t find his crayon. （_________）
2．The crayon is under Helen’s chair. （_________）
3．At last（最后）, Liu Tao find（找到）his crayon. （_________）
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
