浙江金华的双龙洞真有意思。要想进洞,需要仰卧在一只很小的船里,当通过一段孔隙时,需要从tún bù(______)到脚跟都贴着船底,稍微把头抬起来,就会擦破é tóu(______)。洞内的石笋颜色各异,chà nà jiān(_______)让我大开眼界。我nǔ lì(______)睁大眼睛欣赏着眼前的美景。
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