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1．which situation is the most dangerous according to the material?
| A．An old man in a park. | B．A disabled woman in a house. |
| C．A child in a classroom. | D．An outside worker at a construction place. |
①Drink water. ②Stay cool. ③Go swimming. ④Wear light-coloured clothes.
| A．①②③ | B．①②④ | C．①③④ | D．②③④ |
| Outside Temperature 27℃ |
A． | B． |
C． | D． |
| A．A safety notice. | B．A travel guide. | C．A weather report. | D．A car advertisement. |
| A．To warn people not to stay in the car. |
| B．To tell people the importance of extreme heat. |
| C．To remind people to wear lightweight clothes. |
| D．To teach people how to prevent heat-related deaths. |
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
