— Have you seen _____ empty box?

— Do you mean _____ box you showed to me yesterday? I put it in your schoolbag.

A．a, the

B．an, a

C．an, the

D．the, a

高钙血症症状哪项除外（）

A.食欲减退

B.腹痛、便秘

C.恶心和呕吐

D.情绪不稳、反应迟钝

E.高烧