I am very happy now, because I have a new pen pal today.
His name is Sam. He
A.is | B.are | C.am |
A.by bike | B.on foot | C.walks |
A.a | B.an | C.the |
A.hobby | B.hobbies | C.likes |
A.stories | B.housework | C.songs |
A.play | B.plays | C.playing |
A.visit | B.visits | C.visiting |
A.watch | B.watches | C.watching |
A.cooks | B.helps | C.tells |
A.good | B.bad | C.shy |
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