系统性红斑狼疮最易累及的脏器是
A．肺部
B．肾脏
C．消化系统
D．大脑
E．心脏
参考答案：B
Kate is my good friend. She often _______ a smile ______ her face and looks happy. [ ]
A. wears; on
B. with; in
C. with; on
D. has; in
若建筑面积相同，则建筑物平面形状的周长最长的是( )形。
A．矩 B．正方C．圆 D．L
