The magnetic field lines are ( ) curves,The<br/>outer space magnetic field line of the permanent magnet is ( <br/>). <br/>A.close-loop/ A: ). <br/>close-loop/<br/>from B: pole<br/>open-loop/<br/>from C: pole<br/>close-loop/<br/>from D: pole to E: pole to F: pole to G: pole to H: pole<br/>open-loop/<br/>from I: pole

The North Pole is surrounded by land, while the South Pole is surrounded by the Antarctic Ocean. So scientists thought that______. A: most of the ice melted in the Northern hemisphere B: most of the ice melted in the Southern hemisphere C: The North Pole is colder than the South Pole D: The South Pole is colder than the North Pole

The competition at the National Junior Olympics is the most challenging in Michael’s pole-vaulting career.

Gothic architecture could soar to great heights thanks to new techniques, such as pointed arches, ribbed vaulting and flying buttress.

Like the island continent of America, Australia is located entirely in (). A: the Northern Hemisphere B: the Southern Hemisphere C: the North Pole D: the South Pole

Despite the fact that the South Pole is as snow-covered and stormy-weathered as the North Pole, is colder than the North Pole. A: Despite the fact B: as snow-covered C: as D: is colder

When did the speaker swim across the North Pole?

The_____ is one of the necessary instruments in the North Pole exploration.

Give the Chinese equivalent to the following term.the North Pole

He would be able to reach the Pole _____ was 300 miles away.