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|  | Top News Nation Three child policy World COVID Business Belt-road trades go up Sports Volleyball Nations League Entertainment Zhang Yimou’s hot new movie | Website search: GoInternet search: GoAdvertisement:  | ||
1．How many main sections are there in the website?
| A．Two. | B．Three. | C．Four. | D．Five. |
| A．Write news. | B．Talk with other people. | C．Get free fruit. | D．Make short movies. |
| A．At the top of the page. | B．In the center of the page. | C．On one side of the page. | D．Next to the family picture. |
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
