现金交割
参考答案：
是指合约到期时，交易双方按照交易所的规则、程序及其公布的交割结算价进行现金差价结算，了结到期未平仓合约的过程。
Dad always _______ his shoes and leaves them by the front door when he comes back. [ ]
A. takes down
B. takes off
C. takes away
D. takes up
易感部位为人鳞状上皮细胞
A．沙眼衣原体沙眼生物变种B．沙眼衣原体鼠生物变种C．沙眼衣原体LVGD．豚鼠结膜炎衣原体E．猫肺炎衣原体
