张爷爷:我和老伴都80多岁了,就想着能在小区里有个地方吃饭,那多省事啊。现在有了“老年餐桌”,走路用不了几分钟,就能吃上饭。真好!
李奶奶:“老年餐桌”价钱可便宜啦,花几块钱就能吃一顿饭,有荤,有素,还有汤,饭菜都不错,吃得特可口!
赵爷爷:政府不但给补贴,还给指定餐馆挂牌呢,要是饭菜不好,不讲卫生,服务不好,就摘它的牌。
理由一: ① 理由二: ② 理由三: ③
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