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There are many rules in our school. We mustn’t (不准) be late for class. If we are late, our teachers will be angry. We can play games before class. We mustn’t talk or listen to music in class. We can talk with friends after class. We mustn’t argue or fight (打架) with classmates. We mustn’t play football or basketball in the classroom. We can play in the playground.
1．We mustn’t be late for class.2．We can play games in class.
3．We mustn’t talk with friends after class.
4．We mustn’t argue or fight with classmates.
5．We can play football in the playground.
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
