1.内洞的景物有
2.内洞的特点可以用三个字概括,在正确的选项的括号里画“√”
亮( ) 奇( ) 大( ) 黑( )
3.把“这些石钟乳和石笋,形状变化多端再加上颜色各异,即使不比作什么,也很值得观赏”改为“这些石钟乳和石笋,形状变化多端,颜色各异,很值得观
赏”好不好?为什么?

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

