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Hi, I’m Mary. Welcome to my room. Look at the beautiful kites. How many? One, two…eight! Here is my toy box. What’s in it? Guess! Let me open it and see. Wow! One toy bear, two big balls, four cars…And I have ten books on the desk. How many books do you have?
1．Mary has eight kites. （2．Mary has ten books and five pencils. （
3．There are two balls and four cars in the toy box. （
4．The books are in the toy box. （
5．Mary doesn’t have toy bear. （
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
