搜索
1．When was Mother’s Day first celebrated?
| A．In 1905. | B．In 1908. | C．In 1914. |
| A．She was a soldier during the Civil War. |
| B．She founded Mother’s Day Work Clubs. |
| C．She brought up the idea of Mother’s Day. |
| A．President Wilson. | B．The U.S. Congress. | C．Anna Marie Jarvis. |
| A．The origin of Mother’s Day. |
| B．The celebration of Mother’s Day. |
| C．The importance of Mother’s Day. |
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
