下列哪一项不是癌细胞的特征[ ]
A.细胞具有无限繁殖能力
B.细胞膜上糖蛋白等物质增多
C.细胞的形态结构发生改变
D.容易扩散
答案:B
My father _____________ go to work by bike. He goes on foot. [ ]
A. does
B. don't
C. doesn't
胁痛病理变化包括虚实两端,可归纳为不()则痛和不()则痛。