【判断题】《易经》中屯卦六三爻展示了君臣关系的建立之道。()
【单选题】What is one of the problems facing POP agencies?
A.
There is a shortage of retail space.
B.
There are insufficient POP specialists.
C.
There is not enough interest in the medium.
【判断题】《易经》中屯卦六三爻展示了君臣关系的建立之道。()
【判断题】There is a exciting pop music concert on TV.
【单选题】工业纯铁指的是 碳的质量分数为( )的铁碳合金。