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Mr. Li is an English teacher. He works in Shijiazhuang. In January, he wants to go on a trip to Hainan with his friend. Hainan is far from Shijiazhuang. It is about 2400 kilometres. They want to take a plane. Because a plane is fast. They leave for 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．A plane is fast, so they will go to Hainan by plane.
3．It’s about 2400 kilometres from Shijiazhuang to Hainan.
4．They leave Shijiazhuang and arrive in Hainan on the same day.
5．In January, Hainan is cold.
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
