欧洲晚期的“新轮作制度”的优点不包括下面哪一项（）
A、促进了海外贸易
B、土壤得到休息
C、延长了农田劳动季节
D、增加了农作物种类
参考答案：A
So far, the moon is the only one of the heavenly bodies in space ______ reached by manned spaceships.
A．that has been
B．what have been
C．which has been
D．that have been
295B、WK—4、WK—10电铲推压传动系统
