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Sam is seven years old and this is his first day to go to school. After school, he comes back home and he looks very happy. His mother asks him, “Sam, how is your school?” “Very nice. And our teachers are all nice to us, too.”
The next day, Sam comes back home again. His mother asks him the same question (同样的问题). Sam answers, “I don’t like our Math teacher very much.” “Why?” his mother asks.
“Yesterday (昨天) he tells (告诉) us that 5+3= 8, but today he tells us that 4+4= 8 too. I really can’t understand.”
1．Sam is a new student.
2．All the teachers are nice but the Math Teacher isn’t in Sam’s school.
3．As we all know 5+3= 8 is just equal to (等于) 4+4= 8.
4．From the story we know that the Math teacher is a bad teacher.
5．Sam is a lovely small boy.
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
