搜索
John is nine years old. He is a student of Grade Three. He goes to school from Monday to Friday. But he doesn't go there on Saturday or Sunday. John's school is not far (远) from his home. He walks there. Today he comes back very late. His mother asks him,
“John, why do you come back so late?” John says, “Our teacher is angry. She asks a question (问题) in class. But no one can answer (回答) it except (除了) me. “Then John's mother asks, “What question is it?” John says, “The question is: who puts ink (墨水) on my chair? My answer is: it's me.”
1．John goes to school on Saturday and Sunday.2．John goes to school on foot.
3．No one can answer the teacher's question.
4．John knows who puts ink on the teacher's desk.
5．John's mother is happy because John can answer the teacher's question.
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
