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Wash Your Hands After...
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| Proper Hand Washing with Soap and Water ●Wet your hands with warm, running water and spread soap, and lather(起泡沫) well. ●Move your hands forward and back hard together for at least a quarter of a minute. ●Clean all surfaces, including the backs of your hands, between your fingers and so on. ●Wash well. ●Dry your hands with a piece of clean cloth. |
1．When should you wash your hands?
| A．Before playing with dog. | B．Before coughing. | C．After using the bathroom. |
| A．Wet your hands with lather. | B．Dry your hands after washing. | C．Only clean the backs of your hands. |
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
