There are no polar bears in the south pole同义句 There are---- ---- polar bears in the south pole.

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• There are no polar bears in the south pole同义句 There are---- ---- polar bears in the south pole.
• The polar bear is a very big white bear.We call it the polar bear because it lives inside the Arctic Circle(北极圈）near the North Pole(北极）.There are no polar bears at the South PoleThe polar bear lives in the snow and ice.At the North Pole there is snow,ice and water.There is not any land.You can't see the polar bear in the snow because its coat is yellow-white.It has a very warm coat because the weather is cold north of the Arctic Circle.This bear is th
• There are no polar bears in the south pole同义句 There are---- ---- polar bears in the south pole.
• 已知点P在曲线y=-4/e^x+1上,a为曲线在点P处的切线的倾斜角,则a的取值范围是
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