She had a guilty________ about not telling the police what had actually happened.

A．consciousness

B．conscience

C．consequence

D．confusion

常染色体数目异常：（）

A．脊柱裂儿 

B．13三体综合征（即Patau综合征）儿 

C．无丙种球蛋白症 

D．黑蒙性白痴病 

E．先天性卵巢发育不全症