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B: Good afternoon, Liu Tao.
A: This is my sister, Yang Ping.
B: Nice to meet you, Yang Ping.
C: Nice to meet you, too.
1．( )
| A．“A” is Liu Tao. | B．“A” is Yang Ling. |
| A．“B” is Liu Tao. | B．“B” is Yang Ling. |
| A．It’s morning. | B．It’s afternoon. |
| A．“C” is Yang Ping. | B．“C” is Yang Ling. |
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
