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Last spring, our class had a spring trip. We got on the bus at 8: 00. After half an hour, we got to the zoo. Then we visited the zoo. At eleven o'clock, we began to make dumplings, and we had our lunch at 12 : 00. After we had a rest, we rowed a boat at 14: 00. Two hours later we took pictures, sang and danced together. We had a very good time!
1．When did the class have a spring trip? （ ）A．This spring.  | B．Last spring. | C．Next spring. |
A．To the zoo.  | B．To make dumplings. | C．To row boats. |
| A．At 11 o'clock. | B．At 14 o'clock. | C．At 12 o'clock. |
| A．They had a rest. |
| B．They took pictures, sang and danced together. |
| C．They rowed a boat. |
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
