They went to the Great Wall ______ vacation last year.[ ]
A. at
B. on
C. to
D. in
答案:B
下列超声表现中,血吸虫性肝病的特点是()
A.肝回声呈地图样(或网格状或鳞片状或沙漠样改变)
B.左叶增大明显
C.门静脉增宽
D.肝包膜不平
E.脾肿大
笔迹的搭配特征