近年来,北极航道通航能力大大提升。下图示意上海港经北极航道至荷兰鹿特丹港的新航道和传统航道线路,
(1)一艘考察船从我国上海出发,沿北极航道(东北航道)穿越A
(2)传统航道经过了C
(3)北极航道的考察船一般选择在7月出发,其自然原因是
(4)读图可知,与传统航道相比,北极航道的优势是
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