(1)妹妹不会系(xì jì)鞋带,我说:“没关系(xì jì),我来帮你!”
(2)小狗的毛已经长(zhǎng cháng)得很长(zhǎng cháng)了。
(3)“丁(dīnɡ dīn)零(líng lín)”,上课铃响了,同学们快速跑进教室。
(4)你没发(fà fā)现,咱们的头发(fà fā)还能长长呢。”
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