A.点燃激情,传递梦想;凝聚爱心,支援灾区。(街头横幅) |
B.保护草坪,请勿踩踏;爱护花木,请勿采摘。(公园告示牌) |
C.反对邪教,关爱家庭;珍惜生命,崇尚科学。(社区标语牌) |
D.润肺化痰,止咳平喘;护喉利咽,生津补气。(药品广告) |
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