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Mr. Li is a doctor. He works at a hospital in Shijiazhuang. In January he wants to go on a trip to Hainan with Mrs. Li and their daughter. Hainan is far from Shijiazhuang. It is about 2, 400 kilometers. They want to take a plane. Because the plane is fast. They go to Hainan in the morning on January 20 and arrive in Hainan in the evening. They are going to stay in Hainan for seven days, because it is warm in Hainan.
1．Mr. Li teaches Chinese.2．There are four people in Mr. Li's family.
3．It's about 2,400 kilometers from Shijiazhuang to Hainan.
4．They leave Shijiazhuang and arrive in Hainan on the same day.
5．In January Hainan is warm.
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
