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B: 2．
A: We have two.
C: This is our music club. 3．
B: How many music lessons do you have in a week?
C: We have two.
B: 4．
C: Yes. I like singing.
A: I like dancing.
B: Great! 5．
A and C: Certainly.
| A．We often sing and dance here. |
| B．We often draw and paint here. |
| C．Can you sing and dance for us? |
| D．Do you like music? |
| E．How many art lessons do you have in a week? |
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
