The Library of Congress acquired the map in______.
A. the early part of the 20th century
B. the middle part of the 20th century
C. the latter part of the 20th century
D. the early part of the 21 st century
人的潜力是一个固定的存在，随着外界环境的刺激处于一种可塑性的状态。()
The primary significance of the map is that______.
A. it is very old
B. it was lost for a very long time
C. it was the first map to have named the continent "America"
D. it was drawn by renowned mapmaker Martin Waldseeuller
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