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It is Sunday morning. Mr Brown and his son, Bill, are in a big shopping mall. Mr Brown wants to buy a new dress for Mrs Brown. Bill likes oranges. So his father buys two kilos of oranges for him too. There are many things and many people in the mall. There are men and women, old and young. They all want to buy something there. The people in the mall are friendly. They will be glad to help you find what you are looking for.
1．Mr Brown and Bill are in a big shopping mall on Saturday morning.2．Mrs Brown wants to buy a new dress for Mr Brown.
3．Bill likes oranges. So his father buys him 2 kilos of oranges.
4．There are a lot of things and many people in the mall.
5．The people in the mall are old and friendly.
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
