问题: 英语
Polar bears lives mostly on() sea ice, which
they use as () platform for hunting seals.
A a;a
B /;a
解答:
Polar bears lives mostly on( ) sea ice, which they use as () platform for hunting seals.
A a;a
B /;a
B
*当物质名词表示一般概念泛指时不加冠词。
例如：Paper is made from wood.
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