它是工业革命中最大的技术发明，为大机器生产解决了最关键的动力问题。“它”指 [ ]
A．珍妮机
B．联动式蒸汽机
C．蒸汽机车
D．内燃机
答案：B
Part of the family are out on holiday. They are supposed to be back ______ this week. [ ]
A. in the end of
B. at the end of
C. by the end of
D. for the end of
业务流水应由（）打印，防止业务流水漏打印、跳号打印
A.柜员自己
B.会计主管
C.柜员交叉
D.任意柜员
