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It's Sunday. Mr Black and his students are on the farm (农场). Mr Black is a science (科学) teacher. Cathy is watering the flowers with Susan. John is running after a little lamb (小羊). He wants to play with it. Lily and Amy are counting (数) the ducks on the lake. Bob is watching the green vegetables. Mr Black is talking with the farmer near the lake. Who's taking photos of (给……拍照) everyone? Laura.
1．Cathy and Susan are watering the green vegetables.2．John wants to play with a cow.
3．There are some ducks on the lake.
4．Mr Black and the farmer are talking with each other.
5．Laura is taking pictures.
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
