Bill seldom helps others, _____ he? [ ]
A. does
B. don't
C. doesn't
答案:A
Wu Lin ran faster than the other boys in the sports meeting. [ ]
A. so
B. much
C. very
D. too
有一老年病人,诊断动脉粥样硬化症十几年,曾出现跛行,左下肢第一足趾逐渐变黑而疼痛,此足趾病变可能为
A.贫血性梗死
B.出血性梗死
C.干性坏疽
D.湿性坏疽
E.黑色素瘤