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Gong Li is a famous Chinese _______ (演员).
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The family _____ on time, but their car had a flat tyre on the halfway.
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Our English teacher often asks us to have a__________(discuss) in groups of four.
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Rt△ABC中,∠C=90°,∠A=30°,点O在斜边AB上,半径为2的⊙O过点B,切AC边于点D,交BC边于点E.则由线段CD、CE及DE围成的阴影部分的面积为 ___。
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