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Danny and his friends are in the park. It’s a sunny day. They are having a picnic.Danny can seea high mountain near the river. He can climb the mountain. Alice and Kitty can catch butterflies on the grass. They can see some nice flowers in the park. And there are some birds in the blue sky. They are singing. How happy they are!
( ) 1. Danny is in the park with his parents.
( ) 2.The sun is shining.
( ) 3. There is a river near the mountain.
( ) 4. The flowers in the park are nice.
( ) 5. We can see some kites in the blue sky.
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
