【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:
【判断题】农产品中的农药残留来自农药的直接喷施,或从土壤中吸收,由水中传输,在空气中飘移等。
【简答题】已知 A(2, 3 ),B(5,2 3 ) ,直线l的倾斜角是直线AB倾斜角的两倍,则直线l的斜率为______.
【单选题】Great men made their way _____ success in difficulties .
【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( )。
【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
【单选题】若直线L的斜率为1,则直线L的倾斜角为 ( )。
【简答题】I made myself familiar with all its places famous in history or fable. I knew every spot where a murder or robbery had been committed or a ghost seen. I visited the neighboring villages and added gre...
【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...