作业帮"（2007湖南,23）Polar bears live mostly on ______ sea ice,which
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"（2007湖南,23）Polar bears live mostly on ______ sea ice,which they use as ___"
"（2007湖南,23）Polar bears live mostly on ______ sea ice,which they use as ______ platform for hunting seals.
A.a; a
B.a; the
C./; a
D.the; /"
"（2007湖南,23）Polar bears live mostly on ______ sea ice,which they use as ______ platform for hunting seals.
A.a; a
B.a; the
C./; a
D.the; /"
答案C
句意：北极熊主要生活在海冰上,它们把海冰当作捕捉海豹的平台.第一空sea ice是不可数名词,在本句中表泛指,故用零冠词.第二空应用不定冠词,指“用作一种平台”.
句意：北极熊主要生活在海冰上,它们把海冰当作捕捉海豹的平台.第一空sea ice是不可数名词,在本句中表泛指,故用零冠词.第二空应用不定冠词,指“用作一种平台”.
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