【单选题】Those ro s es are really pr etty. [音频]
【简答题】PR间期固定,P波后均有QRS波,PR间期>0.20s见于
【单选题】( )是人们对客观事物的价值的总评价和总看法。它一方面表现为价值取向、价值追求、价值目标,另一方面表现为( ),即判断事物有无价值以及价值大小的标准,是文化的核心部分,并将各种文化区别开来。
【简答题】BT's prices for national and international calls are now among the lowest in the world, although local call prices are n______ near the cheapest.