“难”用部首查字法先查__________再查__________画,用音序查字法,先查__________,再查__________,在字典中①不容易,做起来费事:难处。难度。难点。难关。难熬。难耐。难产。难堪。难题。难以。难于。②困难。畏难。急人之难。 ③不大可能办到,使人感到困难:难免。难为。难保。难怪。难倒(dǎo)。难道。难能可贵。 ④不好:难听。难看。 ⑤易
“难易”是(_____)“难过”是(_____)

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

