下列哪些是随意皮瓣（）。
A.旋转皮瓣
B.滑行推进皮瓣
C.交错或异位皮瓣
D.岛状皮瓣
E.肌皮瓣
参考答案：A, B, C
It was in this new hall ____ was just set up last month ____ we held an important meeting yesterday.
A．what; that
B．which; that
C．that; which
D．which; who
艾滋病的传播方式包括（）
A.性接触传播
B.注射途径传播
C.母婴传播
D.器官移植传播
E.人工授精传播
