A、<p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;">S=K</span><sub><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;
vertical-align:sub;">sp</span></sub><sup><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;
vertical-align:super;">1/2</span></sup></p>
B、<p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;"></span><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;">S=(K</span><sub><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;
vertical-align:sub;">sp</span></sub><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;">/4)</span><sup><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;
vertical-align:super;">1/3</span></sup></p>
C、<p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;">S=(K</span><sub><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;
vertical-align:sub;">sp</span></sub><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;">/2)</span><sup><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;
vertical-align:super;">1/3</span></sup></p>
D、<p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;"></span><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;">S=(K</span><sub><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;
vertical-align:sub;">sp</span></sub><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;">)</span><sup><span style="mso-spacerun:'yes';font-family:宋体;mso-bidi-font-family:'Times New Roman';
mso-bidi-font-weight:bold;font-size:12.0000pt;mso-font-kerning:0.0000pt;
vertical-align:super;">1/3</span></sup></p>
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