Sadly, Marie Curie died from ______________ to too much radiation.

A．being exposed

B．exposing

C．exposed

D．having exposed

食管癌早期症状有

A．吞咽时胸骨后烧灼感

B．咽下物有通过缓慢，中有滞留的感觉

C．食物反流

D．声音嘶哑

E．轻度咽下哽塞感