搜索
My grandparents are old. They told me their life was different many years ago. They lived in a small house in a village. They worked in the fields all day long. They cooked on a fire. They didn't have a television, a radio, or a telephone. They didn’t have enough nice food to eat. There weren't any supermarkets. There weren't many cars or buses then.
1．My grandparents lived in a city many years ago.2．They worked in the fields.
3．They had a television, a radio, and a telephone.
4．There were lots of supermarkets then.
5．There weren't many cars or buses then.
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
