1. eful有用的( )
A.ua | B.us | C.su |
A.oa | B.ao | C.oo |
A.au | B.ae | C.ar |
A.a | B.i | C.e |
A.ir | B.in | C.an |
A.ee | B.ea | C.er |
A.a | B.i | C.e |
A.a | B.i | C.e |
A.re | B.ri | C.ar |
A.i;i | B.a;i | C.i;a |
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