[填空题]
The capacitance of a:vxbe m)h 28q;zm0h7 ;nhv( fh y:nw -qlw-lbb0 whw sgrr:thv( n)(k9 portion of a circuit is to be reduced from 4800 pF to 2900 p g)k:thrwv 0 w(rn(9hsF.
What capacitance can be added to the circuit to produce this effect without removing existing circuit elements? $ \times10^{ -9}\;F$
Must any existing connections be broken in the process?