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A sunny day, many students are visiting in Shanghai Zoo. They're having fun there. Look, some boys are watching the monkeys. There are eighteen monkeys there. They're lovely and naughty. Some are sitting on the hill. Some are chasing each other. The girls are watching swans now. The swans are black and white. They're swimming on the river. They're quiet and beautiful. The students like animals very much because animals are our good friends.
1．On Sunday the students are in Shanghai Zoo. （2．There are eighteen monkeys sitting on the hill. （
3．The swans have two colours in all. （
4．The students are happy in the zoo. （
5．The students like animals because they're beautiful. （
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
