[填空题]
What is the linear spz bci+npz .0q,pr6 7nj-vj /qizqc+ 2n*y2 0nj4z:ll gpk t8zeeed of a point (a) on the equator, $m/s$ (b) on the Arctic Circle (latitude 66.5$^{\circ} $ N), $m/s$ (c) at a latitude of 45.0$^{\circ} $ N, due to the Earth’s rotation? $m/s$