【单选题】当一份期货合约在交易所交易时,未平仓合约数会( )。
【单选题】当一份期货合约在交易所交易时,未平仓合约数会()
【单选题】例 3 .火车在长直水平轨道上匀速行驶,车厢内有一个人向上跳起,发现仍落回到车上原处,这是因为( )
A.
人跳起后,车厢内的空气给人一个向前的力,这力使他向前运动
B.
人跳起时,车厢对人一个向前的摩擦力,这力使人向前运动
C.
人跳起后,车继续向前运动,所以人下落后必定向后偏一些,只是由于时间很短,距离太小,不明显而已
【单选题】It was ___ it was raining so hard that we had to stay at home all day.
【单选题】当一份期货合约在交易所交易时,未平仓合约数会( )
【单选题】The result of the experiment made me______. It was not so good as I had expected.
【单选题】It was after he got what he had desired he realized it was not so important. [ ]