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Bob is an American boy. He has two good friends, Tom and David. They come from England. They are in China now. Bob is 1.75 metres. Tom is shorter than Bob. David is taller than Bob. How old are they? Bob is 10 years old. Tom is 12 years old. David is 11 years old. Bob likes English, Tom likes math, and David likes music. They all study hard.
1．They are all from China.2．Tom is shorter than David.
3．Bob is the tallest of the three.
4．David is younger than Bob.
5．Tom likes English and music.
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
