【单选题】The purpose of the motivation study was to discover why ______.
A.
there were deeper reasons
B.
instant coffee did not taste good
C.
regular coffee was successful
D.
people didn't like instant coffee
【单选题】There were deeper tensions underlying last week's outburst.
【单选题】在智能制造流程仿真系统中,解决的核心问题不是
【单选题】目前客户的保证金净值为 15000 美元, 而其未平仓合约所需初始保证金为 24000 美元, 维持保证金为 20000 美元, 则客户必须补缴多少金额的保证金? ( )
【判断题】所有气体经过绝热等熵膨胀以后,温度总是下降的。( )