A.198个                     

B.199个                      

C.200个                     

D.201个

A.198个                                                         B.199个

C.200个                                                         D.201个

A．198个                    B．199个                     C．200个                    D．201个

A.198个               B.199个                C.200个              D.201个

由NaH₂PO₄脱水形成聚磷酸盐Na₂00H₂P₂00O₆₀₁，共脱去水分子的数目为(    )

A.198个            B.199个                C.200个            D.201个