The people who objected to cloning human beings went on strike and _________ the traffic.

A．cut through

B．faded out

C．held on

D．held up

关于动脉性溃疡，下列哪项正确（）

A.溃疡边界不规则，肉芽灰白色，不易出血，疼痛明显

B.溃疡底部湿润，肉芽鲜红，易出血，周边有色素沉着及静脉曲张

C.溃疡好发于受压迫处，肉芽新鲜，易出血，疼痛明显

D.慢性溃疡，长期流脓，X光片骨质有破坏

E.慢性溃疡，溃疡周边组织活检见异型细胞