霜由地面水汽遇冷凝结而成。下图示意福建省年平均霜日数分布。读下图,完成下面小题。

1.表示霜冻的天气符号是( )
A.![]() | B.![]() | C.![]() | D.![]() |
A.漳州市、厦门市 | B.泉州市、莆田市 |
C.宁德市、南平市 | D.三明市、龙岩市 |
A.自东南向西北递减 | B.自中部向四周递减 |
C.自东南向西北递增 | D.自中部向四周递增 |

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

