下图所示为“某地朝南窗户二分二至日正午阳光入射图”。据图完成下列小题
1.当阳光如③所示射入窗户时( )
A.我国恰好是一年中气温最高的月份 |
B.福州正值昼长夜短 |
C.福州四中旗杆正午的影子达到全年最长 |
D.福州四中旗杆正午的影子达到全年最短 |
A.90°E | B.105°E | C.150°E | D.160°E |
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