A.将鞋线一松一紧,那竹节人就手舞之、身摆之地动起来。 |
B.桌面上是一道道豁开的裂缝,像黄河长江,一不小心,铅笔就从裂缝里掉下去了。 |
C.破课桌,俨然一个叱咤风云的古战场。 |
D.弯弯的内金水河像一条玉带横贯东西,河上是五座精美的汉白玉石桥。 |
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