查加点的字 | 部首 | 除去部首还有几画 | 选择正确的字义,打“√” |
左 | _____ | _____ | ①回头看,泛指看。( ) ②照管,注意。( ) |
为之一 | _____ | _____ | ①摇动,挥动。( ) ②奋起,兴起。( ) |
严 | _____ | _____ | ①恭敬。( ) ②严正,认真。( ) |

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

