在我国最好发的口腔颌面部恶性肿瘤是（）
A．上颌窦癌
B．舌癌
C．牙龈癌
D．膊癌
E．颊癌
参考答案：B
Tom usually _________ a bike to school. Look, he _______ to school now.
A．rides; is riding
B．is riding; is riding
C．rides; rides
D．is riding; rides
治疗疮疡肿痛，下列宜选用的药是（）
A.羌活
B.白芷
C.藁本
D.细辛
E.防风
