搜索
Hello, I’m Sam. This is my bedroom (卧室). There is a schoolbag on the desk. There are some books on the chair. There are some photos on the wall (墙壁). Let’s have a look. There is a big tree in the photo. There are two birds in the tree. They are singing. There is a dog. It’s eating. There is a boy and a girl under the tree. They’re playing chess.
1．There is a book on the chair. （2．There are some photos on the wall. （
3．The birds are dancing. （
4．There is a dog. It’s climbing the tree. （
5．There is a boy and a girl under the tree. They are playing chess. （
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
