交易单位
参考答案：
也称为合约规模（ContractSizE.，是指在期货交易所交易的每手期货合约代表的标的物的数量。
The US President Obama told the students that he ______ by a single mother who were strict with him and wished him great success in his studies.
A．will have been brought down
B．has been carried out
C．was brought up
D．was about to be cared for
治疗血淋、尿血属实热证的常用方剂为（）
A.十灰散
B.四生丸
C.小蓟饮子
D.槐花散
E.咳血方
