【单选题】-Dongdong, ____ car is that? -It's ____. [ ]
【简答题】凯恩斯总供给曲线的形状是________。
【判断题】自动驾驶模式ATO模式下的常用制动是由列车自动驾驶系统ATO手动触发或由ATP在列车超过目标速度时自动触发。
【单选题】— Listen, what's the noise? — My father ____ the programme of the World Cup. [ ]
【单选题】— Dongdong,__________ toy car is that? — It’s _________.