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Today is Ann’s birthday. There’s a big cake on the desk. There are thirteen candles (蜡烛) on the cake. There are many birthday cards and a letter on the desk. How many? Let me see. One, two, three… twenty-one. Yes, there are twenty-one, including (包括) the letter. The letter is from her friend, Jenny. She is not in the same school as Ann’s. Ann is very happy to get these cards and Jenny’s letter.
1．How old is Ann? ( )| A．30. | B．13. | C．21. |
| A．A birthday cake. | B．Many birthday cards and a letter. | C．Both A and B. |
| A．Three. | B．Twenty. | C．Twenty-one. |
| A．She is Ann’s friend. | B．She is Ann’s sister. | C．She is Ann’s classmate |
| A．Today is Ann’s birthday. |
| B．Jenny and Ann are in the same school. |
| C．Ann is very happy today. |
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
