A、<p><span style="font-family: 宋体; font-size: 13px; line-height: 19.5px; ">交易工具的期限</span></p>
B、<p><span style="font-family: 宋体; font-size: 13px; line-height: 19.5px; ">交易标的物</span></p>
C、<p><span style="font-family: 宋体; font-size: 13px; line-height: 19.5px; ">交割期限</span></p>
D、<p><span style="font-family: 宋体; font-size: 13px; line-height: 19.5px; ">交易方式</span></p>
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