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I’m Sun Wei. I live in Qingdao. The winter vacation is coming. My parents and I are going to take a trip to Hainan this winter vacation. In winter it’s cold in Qingdao, but it’s warm in Hainan. We are going there by plane. First, we’re going to Haikou. I’m going to buy some postcards there. And then we’re going to Sanya. We are going to have a good time on the beach(海滩).
1．Sun Wei lives in Qingdao.2．In winter it’s cold in Hainan.
3．Sun Wei and his parents are going to Hainan by train this winter vacation.
4．Sun Wei is going to buy some postcards in Haikou this winter vacation.
5．Sun Wei and his parents aren’t going to Sanya this winter vacation.
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
