财产保险合同一般采用的是定值保险合同形式。()

A．Excretion of hydrogen ions is balance by production of bicarbonate ions. 
B．More bicarbonate ions have to be generated in advance to counter hydrogen ions.
C．The lungs have to conserve hydrogen ions if the body is not able to eliminate hydroxide ions.
D．The kidneys have to work more to compensate for the slower elimination of acids in the lungs.