搜索
| | √ | × |
| on foot | stop at a red light | go at a red light |
| by ferry | wear a life jacket | run on the ferry |
| by sled | drive slowly | Let the dogs run too fast |
| by motorbike | wear a helmet | ride too fast |
例：on foot ： √ You must stop at a red light .
× Don’t go at a red light
[[QOrDeR]]by ferry : √ You must wear a life jacket .
× ___________________________
【小题2】by sled : √ __________________________
× Don’t let the dogs run too fast .
【小题3】by motorbike : √ __________________________
× _____________________________
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
