1.我的妈妈正在种葡萄。
My mother _______ ________ ________.
2.“你喜欢跑步吗?”“不,我喜欢散步。”
- Do you like _______? - No, I ______ walking.
3.刘涛没在睡觉,他在做家庭作业。
Liu Tao isn’t _______. He is doing his ________.
4.苏洋正在教室里帮助海伦。
Su Yang _______ ________ Helen in the classroom.
5.“南希在做什么?” “她在扫地。”
- ______ is Nancy _______? - She is _______the floor.
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