题目

________while writing, he locked himself in his study. A．Not to interrupt                     B．Not being interrupted C．Not to be interrupted             D．Being not interrupted 答案：C3、如图，把一根小棒OC一端钉在点O，旋转小木棒，使它落在不同的位置上形成不同的角，其中∠AOC为锐角，∠AOD为直角，∠AOE为钝角，木棒转到OB时形成的角为平角．（回答钝角、锐角、直角、平角）