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| have milk | go shopping | take a dancing class | make the bed | |
| Sunday | √ | √ | ||
| Monday | √ | √ | √ | |
| Tuesday | √ | √ | ||
| Wednesday | √ | √ | √ | |
| Thursday | √ | √ | ||
| Friday | √ | √ | √ | |
| Saturday | √ | √ | √ | |
| always, usually, sometimes, often | ||||
1. I
2. I
3. I like dancing. I
4. I
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
