1.将②号磁铁由下到上靠近①号磁铁,①号磁铁( )
A.会转动 | B.不会转动 | C.会立起来 |
A.会转动 | B.不会转动 | C.会立起来 |
A.吸引 | B.排斥 |
A.同极相吸,异极相斥 | B.同极相斥,异极相吸 |
C.相同形状的磁铁相互排斥,不同形状的磁铁相互吸引 |
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