虚拟网包月资费的用户退出虚拟网后,若当月再加入另一单位的包月虚拟网,则当月需向用户收取两笔虚拟网包月费。()
参考答案:错
In this institution a medal together with a prize of certain sum of money _______ gains success in science and technology every two years.
A.are given to anyone
B.is given to whoever
C.are given to who
D.is given to whom
双绕组电机相数及接线方式()