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We have a big playground in our school. We all like to
It’s Friday. We have only two lessons in the afternoon.
George, John and Paul are students of Grade One. They are playing with yo-yos. They are playing very
| A．have | B．make | C．play |
| A．at | B．in | C．on |
| A．Before | B．When | C．Then |
| A．playground | B．classroom | C．office |
| A．playing | B．having | C．making |
| A．watching | B．looking | C．washing |
| A．football | B．baseball | C．tennis |
| A．nice | B．good | C．well |
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
