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Jim and Tom are
| A．twin sister | B．twins sisters | C．twin brothers | D．twins brothers |
| A．a | B．an | C．the | D．× |
| A．new | B．new student | C．a new student | D．a new |
| A．school | B．School | C．schools | D．Schools |
| A．class | B．Class | C．classes | D．Classes |
| A．is | B．isn’t | C．are | D．aren’t |
| A．room | B．Room | C．rooms | D．Rooms |
| A．He | B．His | C．They | D．Their |
| A．at | B．like | C．after | D．to |
| A．friend | B．friends | C．student | D．students |
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
