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I know you collect stamps, so I’m sending you some stamps from the UK, I hope you like them. Did you know that the UK made the first stamp in the world in 1840.The stamp’s name was “Penny Black”. It’s now very expensive.
Love,
Grandma.
1．What is grandma doing? ( )
| A．Sending stamps. | B．Reading books. |
| A．The UK. | B．The US. |
| A．Bill Black. | B．Penny Black |
| A．No, it isn’t. | B．Yes, it is. |
| A．Amy. | B．Grandma. |
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
