胃溃疡（）
A．酸度增高
B．长期反复发作
C．疼痛有规律性
D．上腹局限压痛
E．压痛点在中线偏左
参考答案：E
已知∠AOB=140°，OC是∠AOB的角平分线，射线OD在∠AOB的内部，∠AOD=50°，那么∠DOC=______．
I was tired of school work, but my father told me that he didn’t _____school this year.
A．approve my leaving
B．approve me to leave
C．approve of my leaving
D．approve of me to leave
