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Every summer holiday, I will go to my grandparents’ beach house. The house is only five minutes’ walk from the beach.
One afternoon, my grandparents and I took the dog for a walk on the beach. I took off my shoes and ran after the dog. We had such great fun that we completely forgot the time.
When they took a close look, they found that it was a piece of glass from a broken bottle. I felt better after a few minutes, so I asked my grandparents, “
| A．Shall we go back home? |
| B．Shall we throw the pieces of glass away? |
| C．They ran over to me in seconds. |
| D．It was getting quite dark before we realized it. |
| E．I hardly remembered the way in the darkness. |
| F．We can head towards the beach anytime. |
| G．Our actions worked. |
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
