It is a delight to fly at the Pole because there
A.planes fly higher than at the equator B.the eyes can reach about 4,000 meters C.planes are clear of bad weather D.planes fly more quickly than at the equator
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答案解析:
回答题Questions 1 to 5 are based on the following passage :We a
回答题Questions 1 to 5 are based on the following passage :We all know that it is