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Dreams may be more important than sleep. Some people don’t n1． much sleep. However, we all need to d2．.
Dreams take up about one q3． of our sleeping time. People have several dreams e4． night. Dreams are like s5． films. They are usually in colour. Some dreams are like old films. They c6． to us over and over again. That may be because the d7． is worrying about something.
Dreaming may be a way of trying to find an a8．. Some people get new i9． about their work from dreams. They may think about their work all day. Then these things go i10． their dreams.
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
