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1．Whose family photo is this?(这是谁的家庭照片？) ( )
| A．Lingling’s. | B．Sam’s. | C．Daming’s. |
( )| A．She is Sam’s mother. | B．She is Sam’s teacher. | C．She is Lingling’s mother. |
( )| A．They are Lingling’s grandma and grandpa. | B．They are old. | C．They are Sam’s grandma and grandpa. |
( )| A．Yes, it is Sam. | B．No, it is Tom. | C．Yes, it is Lingling’s brother. |
| A．Four. | B．Five. | C．Six. |
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
