A plane perpendicular to the polar axis will never form what line on the Earth’s surface? ()
Within the polar areas it is()to see a satellite in geostationary orbit.
A METHOD OF TOWING VESSELS THROUGH POLAR ICE BY MEANS OF ICEBREAKING TUGS WITH A SPECIAL STERN NOTCH SUITED TO RECEIVE AND HOLD THE BOW OF THE VESSEL TO BE TOWED defines().
In polar regions you should NOT expect to see().
Within the polar areas it is()to see a satellite in geo-stationary orbit .
极地大陆气团(Polar continental air mass):(),空气层结稳定。