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One day, Beibei went to a clothes shop. He wanted to buy a shirt for himself, but there were so many shirts there. He didn’t know which one was more suitable. The shop keeper saw him and came over to help him. “What color and size do you want?” the shop keeper asked. Beibei told her the size and the color. The shop keeper chose one shirt for him. Beibei put it on and felt very comfortable. “How much is it?” He asked the shop keeper. “Eighty yuan.” the shop keeper answered. Beibei looked at himself in the mirror and found himself very handsome. “Very good.” he said, “I decide to buy it.”
1．Beibei wanted to buy himself a skirt.2．Beibei didn’t know how to choose a shirt.
3．Beibei tried on one shirt and he felt good.
4．Beibei didn’t buy the shirt.
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
