Class rules
1. Keep the classroom clean.
2. Listen carefully(仔细地) when the teacher is talking.
3. No food in class.
4. Always say “Please” “Thank you” and “Sorry”.
5. Don’t run in the classroom.
6. Do tell your teacher if you see a classmate in trouble.
7. Don’t be late for class.
8. Don’t take anything that doesn’t belong to(属于) you.
1.When the teacher is talking, you should listen carefully.
2.You can eat candy when you have lessons.
3.You should say “Thank you” when your classmate helps you.
4.You should tell your teacher if your classmate is sick.
5.If you like your classmate’s pen, you can take it home without(没有) asking him.
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