(1)贾谊《过秦论》中,“
(2)《列子·汤问》中的“匏巴鼓琴而鸟舞鱼跃”极写音乐之美妙,李贺《李凭箜引》中“
(3)“空”字在古诗词中出现频率高,诗人常用以形容环境空旷宁静,如“空山新雨后,天气晚来秋”;也常用以表达一种悲凉伤感情绪,如“
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