【正确答案】各支路电流和储能元件电压参考方向如题解如图所示。
   图(a)：
    [TABLE class=extable_c border=0 cellSpacing=0 align=center>
<TBODY>
<TR>
<TD rowSpan=2>&nbsp;</TD>
<TD rowSpan=2>i₁</TD>
<TD rowSpan=2>i₂</TD>
<TD rowSpan=2>i</TD>
<TD rowSpan=2>u_L</TD></TR>
<TR></TR>
<TR>
<TD rowSpan=2>0_-</TD>
<TD rowSpan=2>2A</TD>
<TD rowSpan=2>2A</TD>
<TD rowSpan=2>0</TD>
<TD rowSpan=2>0</TD></TR>
<TR></TR>
<TR>
<TD>0₊</TD>
<TD>5A</TD>
<TD>2A</TD>
<TD>3A</TD>
<TD>-6V</TD></TR></TBODY></TABLE>
   图(b)：
    <TABLE class=extable_c border=0 cellSpacing=0 align=center>
<TBODY>
<TR>
<TD rowSpan=2>&nbsp;</TD>
<TD rowSpan=2>i₁</TD>
<TD rowSpan=2>i₂</TD>
<TD rowSpan=2>i</TD>
<TD rowSpan=2>u_c</TD></TR>
<TR></TR>
<TR>
<TD rowSpan=2>0_-</TD>
<TD rowSpan=2>1A</TD>
<TD rowSpan=2>1A</TD>
<TD rowSpan=2>0</TD>
<TD rowSpan=2>4V</TD></TR>
<TR></TR>
<TR>
<TD>0₊</TD>
<TD>1A</TD>
<TD>0</TD>
<TD>1A</TD>
<TD>4V</TD></TR></TBODY></TABLE>
   图(c)：
    <TABLE class=extable_c border=0 cellSpacing=0 align=center>
<TBODY>
<TR>
<TD>&nbsp;</TD>
<TD>u_c</TD>
<TD>u_L</TD>
<TD>i_c</TD>
<TD>i_L</TD>
<TD>i</TD></TR>
<TR>
<TD rowSpan=2>0_-</TD>
<TD rowSpan=2>0</TD>
<TD rowSpan=2>0</TD>
<TD rowSpan=2>0</TD>
<TD rowSpan=2>0</TD>
<TD rowSpan=2>0</TD></TR>
<TR></TR>
<TR>
<TD>0₊</TD>
<TD>0</TD>
<TD>5V</TD>
<TD>1A</TD>
<TD>0</TD>
<TD>1A</TD></TR></TBODY></TABLE>
   图(d)：
    <TABLE class=extable_c border=0 cellSpacing=0 align=center>
<TBODY>
<TR>
<TD>&nbsp;</TD>
<TD>u_L</TD>
<TD>i</TD>
<TD>i₁</TD>
<TD>i₂</TD>
<TD>i₃</TD></TR>
<TR>
<TD rowSpan=2>0_-</TD>
<TD rowSpan=2>0</TD>
<TD rowSpan=2>0</TD>
<TD rowSpan=2>2A</TD>
<TD rowSpan=2>1A</TD>
<TD rowSpan=2>1A</TD></TR>
<TR></TR>
<TR>
<TD>0₊</TD>
<TD>4V</TD>
<TD>3A</TD>
<TD>0</TD>
<TD>1A</TD>
<TD>2A</TD></TR></TBODY></TABLE>
   图(e)：
    <TABLE class=extable_c border=0 cellSpacing=0 align=center>
<TBODY>
<TR>
<TD>&nbsp;</TD>
<TD>U_c</TD>
<TD>i₁</TD>
<TD>i₂</TD>
<TD>i</TD></TR>
<TR>
<TD rowSpan=3>0_-</TD>
<TD rowSpan=3>U_s</TD>
<TD rowSpan=3><span name='maths'>\frac{U_{s}}{R_{1}}</span></TD>
<TD rowSpan=3>0</TD>
<TD rowSpan=3><span name='maths'>\frac{U_{s}}{R_{1}}</span></TD></TR>
<TR></TR>
<TR></TR>
<TR>
<TD rowSpan=3>0₊</TD>
<TD rowSpan=3>U_s</TD>
<TD rowSpan=3><span name='maths'>\frac{U_{s}}{R_{1}+R_{2}}</span></TD>
<TD rowSpan=3><span name='maths'>\frac{U_{s}}{R_{1}+R_{2}}</span></TD>
<TD rowSpan=3>0</TD></TR>
<TR></TR>
<TR></TR></TBODY></TABLE>
   图(f)：
    <TABLE class=extable_c border=0 cellSpacing=0 align=center>
<TBODY>
<TR>
<TD rowSpan=2>&nbsp;</TD>
<TD rowSpan=2>u[sub>C</sub></TD>
<TD rowSpan=2>i[sub>1</sub></TD>
<TD rowSpan=2>i[sub>2</sub></TD>
<TD rowSpan=2>i[sub>3</sub></TD>
<TD rowSpan=2>i[sub>4</sub></TD>
<TD rowSpan=2>i</TD></TR>
<TR></TR>
<TR>
<TD rowSpan=2>0[sub>-</sub></TD>
<TD rowSpan=2>[span name='maths'>\frac{U_{s}}{3}</span></TD>
<TD rowSpan=2>0</TD>
<TD rowSpan=2>[span name='maths'>\frac{U_{s}}{3R}</span></TD>
<TD rowSpan=2>[span name='maths'>\frac{U_{s}}{3R}</span><BR>3R</TD>
<TD rowSpan=2>0</TD>
<TD rowSpan=2>[span name='maths'>\frac{U_{s}}{3R}</span></TD></TR>
<TR></TR>
<TR>
<TD rowSpan=3>0[sub>+</sub></TD>
<TD rowSpan=3>[span name='maths'>\frac{U_{s}}{3}</span></TD>
<TD rowSpan=3>[span name='maths'>\frac{U_{s}}{3R}</span></TD>
<TD rowSpan=3>[span name='maths'>\frac{U_{s}}{3R}</span></TD>
<TD rowSpan=3>0</TD>
<TD rowSpan=3>[span name='maths'>\frac{2U_{s}}{3R}</span></TD>
<TD rowSpan=3>[span name='maths'>\frac{2U_{s}}{3R}</span></TD></TR>
<TR></TR>
<TR></TR></TBODY></TABLE>