查询、冻结(解冻)、扣划等重要法律文书资料和执行人身份证件(复印件)的保管期限为(),妥善保管,做到调阅有登记,归档要及时。
A.5
B.10
C.15
D.永久保管
参考答案:D
功率因数减小时,角误差将明显变小()
Which of the following would require real-time processing______
A.Playing a computer game
B.Executing a program that predicts the state of economy
C.Printing labels
D.Listening the music