搜索
Look at this photo. It’s a park. There is an old man on the chair. He is reading a book. There is a boy on the bike. He is riding fast. There are three children between the big trees. They are singing. There are two boys on the lake. They are rowing a boat. And there are two girls near the lake. They are playing chess. They are very happy.
1．The old man is ________ on the chair. ( )| A．reading a book | B．riding fast | C．singing |
| A．are rowing a boat | B．are singing | C．are playing chess |
| A．rowing a boat | B．running fast | C．playing chess |
| A．They’re playing chess. | B．They’re rowing a boat. | C．They’re reading a book. |
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
