Do you often smile? Do you like a smiling face?
Smile is very nice. It lets us feel warm in
Smile is very easy, but it is very
Let’s smile every day. Don’t you think so?
1.A.his | B.your | C.our | D.her |
A.take | B.have | C.play | D.help |
A.useful | B.thankful | C.hopeful | D.awful |
A.does | B.buys | C.watches | D.needs |
A.make | B.see | C.give | D.do |

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

