According to recent reports, one of the rare animals, _____ crocodile, will be in danger of dying out in _____ 2020s.

A．a; /

B．the; the

C．the; /

D．/; the

下列化学反应的离子方程式正确的是（　　）

A．氢氧化亚铁溶于稀硝酸：Fe（OH）₂+2H⁺=Fe²⁺+2H₂O

B．醋酸与NaHCO₃溶液反应：H⁺+HCO₃^-=CO₂↑+H₂O

C．向KI溶液中加入FeCl₃溶液：2Fe³⁺+2I^-=2Fe²⁺+I₂

D．将铝片加入烧碱溶液中：2Al+2OH^-+2H₂O=2AlO₂^-+3H₂↑