There are many beautiful flowers in the world, but in parents’ eyes, their children are the       of all.                                         

A．as beautiful as

B．more beautiful

C．less beautiful

D．most beautiful

直肠受照射面积为100cm2时TD5/5的照射剂量是()

A.6000cGy

B.5000cGy

C.7000cGy

D.6500cGy

E.4000cGy