(1)大叔爷爷看到了孩子们幸福的笑脸和愉快的歌声。(修改病句)
(2)铁路要经过很多高山,必须开凿隧道。(改为双重否定句)
(3)姐姐对我说:“我昨天太急了,你不要怪我啊!”(改为转述句)
(4)一滴水很小很小。无数滴水汇集起来,就可以形成江河湖海。(用关联词语连成一句话)
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