尼日尔的法定货币为（）。
A.非洲法郎
B.法郞
C.德国马克
参考答案：A
属于屛蔽泵部件的有（）．
A、轴监测器
B、泵壳
C、转子
D、定子屏蔽套
Jerry was playing football and Tom was playing volleyball. [ ]
A. however
B. meanwhile
C. likely
D. often
