【单选题】
While()money, she had worked very long hours.
A、raising
B、she was raising
C、raised
D、to raise
A、raising
B、she was raising
C、raised
D、to raise
A、Her anchor is dragging B、Her anchor is used in docking C、She is dredging her anchor D、Her anchor holds fast while she is swinging
A、pKa-pH=log[A-]/[HA] B、pH-pKa=log[A-]/[HA] C、pKa-pH=log[A-][HA]/[HA] D、pKa-pH=log[HA]/[A-][HA]