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School Rules
Should | Shouldn’t |
You should be polite. | You shouldn’t be late. |
You should be kind and helpful. | You shouldn’t fight with your classmates. |
You should work hard. | You shouldn’t throw rubbish anywhere. |
You should protect desks and chairs. | You shouldn’t hurt trees and flowers. |
You should keep the classroom clean. | You shouldn’t write words on desks and walls. |
1．You can cut trees in school. （
2．You shouldn’t write words on walls. （
3．You can fight with your classmates. （
4．You should throw the rubbish into the garbage (垃圾桶). （
5．You should help your classmates and respect your teachers (尊重老师). （
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
