【单选题】男性,42岁,伟大部分切除术后,出现严重贫血,表现为外周巨幼细胞增多,其主要有原因是下列哪种物质减少()
【单选题】It was in the name of freedom ______Kennedy led his country deeper into its cruel, hopeless war in Vietnam.
【简答题】There was a man who had four sons. He hoped his sons could learn not to judge things too quickly. So one day he gavehis four sons a task, asking each of them to go to see a pear tree at a distance in ...
【简答题】处于初级水平 at an e________ level
【单选题】男性,42岁,伟大部分切除术后,出现严重贫血,表现为外周巨幼细胞增多,其主要有原因是下列哪种物质减少( )
【简答题】中国地势的基本特征是____________ ,呈现___________阶梯。 第一级阶梯是_________,平均海拔在4000米以上。北部与东部边缘分布有昆仑山脉、祁连山脉、横断山脉,是地势一、二级阶梯的分界线。地势的第二级阶梯上分布着大型的盆地和高原,平均海拔在______________之间,其东面的大兴安岭、太行山脉、巫山、雪峰山是地势二、三级阶梯的分界线。地势的第三级阶梯上分布着__...
【单选题】下列哪一组山脉是我国地势二三级阶梯的分界线:( )
【单选题】He doesn’t work hard at all . So it seems to _______ for him to pass the exam
【单选题】男性,42岁,胃大部分切除术后,出现严重贫血,表现为外周巨幼红细胞增多,其主要原因是下列哪种物质减少( )