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Qingdao is a big city of China. It is in the east of China. It has got about seven million people.
Harbin/north/about three million people
Guangzhou/south/about 10 million people
Shanghai/east/about 17 million people
Xi’an/west/seven million people
Beijing/north/21 million people
Harbin/north/about three million people
Guangzhou/south/about 10 million people
Shanghai/east/about 17 million people
Xi’an/west/seven million people
Beijing/north/21 million people
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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
