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| English book | schoolbag | pencil box | |
| Nancy | |||
| Frank | |||
| Emma | |||
| Mary |
A: Nancy. Is this your English book?
B: Yes, it is. Thank you.
A: And the schoolbag?
B: No, it isn’t. It’s Frank’s schoolbag. Oh, look! Is this your pencil box, Emma?
A: No, it᾽s my friend᾽s pencil box.
B: What᾽s your friend᾽s name?
A: Her name is Mary.
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
