2021年春季,我国多地遭遇多次沙尘暴天气。下图为某次全国沙尘暴天气实况图。读图,完成下面小题。
1.受扬沙和浮尘影响的城市是( )
A.朱日和 | B.北京 | C.济南 | D.武汉 |
A.勤开窗多通风 | B.加强户外锻炼 | C.多洗手勤消毒 | D.戴口罩防风沙 |
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