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( )1.A. No bikes. B. No parking.
( )2.A. Don’t worry. B. Don’t litter.
( )3.A. No smoking. B. No food.
( )4.A. Don’t cry. B. Don’t worry.
( )5.A. No cameras. B. No climbing.
( )6.A. No food. B. Don’t walk.
( )7.A. Don’t cry. B. No bikes.
( )8.A. No smoking. B. Don’t be afraid.
( )9.A. No parking. B. No bikes.
( )10.A. Don’t walk. B. No climbing.
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
