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The Greens are in Beijing today.They are visiting the Palace Museum.It belonged to the Kings many years ago, but it is open to tourists now.The Greens have to walk a lot inside.Bill is Mr Green's son.He wants to sit on the chair in the middle of a sitting room，but a guard comes and stops him.The Greens will go to the Great Wall tomorrow.
( )（1）The Greens are in Beijing today.
( )（2）The Palace Museum didn't belong to the Kings many years ago.
( )（3）The Greens have to walk in the Palace Museum.
( )（4）The Greens will go to the Summer Palace tomorrow.
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
