客户到存取款一体机上存款，有时没有存款提示项，为什么？（）
A.存取款一体机钱箱已满
B.存款模块故障
参考答案：A, B
Almost all of his time ______ experiments, he has no time to visit his parents.
A．devoted to do
B．devoting to doing
C．devoted to doing
D．is devoted to doing
在管道工程中，当流体沿着一条直径不变的直管流动时，管中的流动为均匀流动。
