___ Pearl River flows into ___ South China Sea.

A．The… the

B．The…./

C．The….the

D．A….a

寻找病因应做哪项检查

A．同位素骨扫描

B．妇科检查

C．51Cr红细胞半寿命期测定

D．钡剂灌肠

E．胸部X线检查