易恶变的肿瘤为
A．骨纤维结构不良
B．化牙骨质纤维瘤
C．牙骨质母细胞瘤
D．纤维骨瘤
E．骨化纤维瘤
参考答案：A
呕吐伴黄疸可见于
A．胆石症B．幽门梗阻C．急性胃炎D．急性阑尾炎E．急性肾盂肾炎
They ___________ with the aim of becoming number one in the league.
A．set up
B．set about
C．set out
D．set aside
