It has been found that some government leaders ______ their power while in office to get illegal benefits

for themselves. [ ]

A. employ

B. take

C. abuse

D. achieve

腹部超声检查前的准备包括______

A．前1天晚餐进清淡饮食

B．次日晨饮大量水或饮料

C．检查前应排便

D．便秘者前1天晚上应服缓泻剂

E．不需要特殊准备