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【简答题】
圆柱被平面截切后产生的截交线形状有圆、 和椭圆三种。
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【单选题】直线l 的倾斜角是斜率为√3/3的直线的倾斜角的2倍,则l 的斜率为( )。
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【单选题】男性，65岁。低热伴右侧腹部隐痛不适半年。查体：贫血貌，右侧中腹部扪及6cm×40m质硬肿块，可推动，压痛不明显。最可能的诊断是
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【简答题】A long time ago men hunted for their food . Often they killed wild animals , birds or fish . How did they kill the beasts? They used rocks and wooden sticks . Sometimes they fought with their own hand...
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【单选题】男,65岁。低热伴右侧腹部隐痛不适半年。查体:贫血貌,右侧中腹部扪及6cm×4cm质硬肿块,可推动,压痛不明显。最可能的诊断是:
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【简答题】A long time ago men hunted for their food . Often they killed wild animals , birds or fish . How did they kill the beasts? They used rocks and wooden sticks . Sometimes they fought with their own hand...
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