(1)船两头都系(xì jì )着绳子,管理(chǚ chǜ )处的工人先进内洞,在里边拉绳子,船就进去,在外洞的工人拉另一头的绳子,船就出来。
(2)在洞里走了一转(zhuǎn zhuàn ),觉得内洞比外洞大得多,大概有十来进房子那么大。泉水靠着右边缓缓(huán huǎn )地流,声音轻轻的。
(3)随着山势,溪流时而宽,时而窄(zǎi zhǎi ),时而缓,时而急,溪声也时时变换调(tiáo diào )子。
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