两种目的,对于同一种资源会产生两种不同的结果时,为了更好地完成一种目的,而可能需要对另一目的的完成作出部分牺牲,这种目的间的关系,就是______关系。
参考答案:交替损益
His sister had to wait for him for another two hours, _______ she? [ ]
A. wasn't
B. doesn't
C. hadn't
D. didn't
有关腘窝囊肿,下列不正确的是()
A.又名Baker囊肿
B.一旦确诊应立即手术治疗
C.可局部穿刺、抽液、注射泼尼松
D.多发生在半膜肌腱滑囊和腓肠肌腱内侧头与半膜肌之间的滑囊
E.局部多无明显症状