A. 你必须要在晚上9:00之前上床睡觉。 B. 你不能在桌子上写字。 C. 你必须每天读书。 D. 你不能在河边玩耍。 E. 你必须把你的书放进书桌里。 |
1.You must read books every day.
2.You mustn’t write on the desk.
3.You must put your books in your desk.
4.You must go to bed before 9: 00 pm.
5.You mustn’t play near the river.

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

