题目内容

The old couple around the world since they . ( travel, have traveled; retired, retire )

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he ever for any big companies? ( Has, Is; work, worked )

Yesterday Jim ____________ up at five o'clock. ( woke, wake )

Computers ____________ their place in ordinary people's homes.( have found, have find )

关于上皮组织的特点,错误的是

A. 细胞排列密集,细胞外基质少
B. 有明显的极性
C. 上皮借基膜与深部结缔组织相连
D. 含丰富的毛细血管
E. 含丰富的游离神经末梢