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Today is Sunday. The sun is shining. There are lots of people in the park. Some old men are playing chess. Some women are dancing. Some girls are singing. Some boys are running. A little baby is walking and her mother is helping her. Her father is talking on the phone. Two girls are taking photos of the lake. Some ducks are swimming on the lake. They have a good time.
1．There are lots of animals in the park.2．Some young people are playing chess.
3．There is a lake in the park.
4．Some boys are
and some girls are 
. 5．The baby’s father is talking with the baby.
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
