搜索
1. The children _____________ (sleep) when the fire alarm _________ (ring) last night.
2. I _____________(read) a storybook when my mum _______ (come) into my room.
3. On Monday at 6:00 pm, Mary and I _____________ (have) dinner in a restaurant.
4. I _____________ (watch) TV with my family when you ________ (call) me.
5. Bob _____________ (do) martial arts in the gym when he _____ (hear) the exciting news.
6. We _____________ ( cheer ) at the park when the bells _____________ ( ring ) .
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
