【单选题】
当电子邮件在发送过程中有误时,则____。
①
电子邮件系统会将原邮件退回,并给出不能寄达的原因
③
电子邮件系统会将原邮件退回,但不给出不能寄达的原因
【单选题】
用OutlookExpress接收电子邮件时,收到的邮件中带有回形针状标志,说明该邮件____。
【单选题】
以下选项中____不是设置电子邮件信箱所必需的。
【单选题】
如果你对网页上的一段图文信息感兴趣,想保存到本地硬盘,最好进行____操作。
①
选择“文件”菜单中的“另存为”菜单命令,保存为WEB页格式
③
全选这段信息,然后按右键选“目标另存为”,保存到本地硬盘
【单选题】
Our modern civilization must not be thought of as ______ in a short period of time.
【单选题】
By the time she is 50 years old, she _____ an inmate of the prison for over half of her life.
【单选题】
He has been writing the essay the whole morning and he still ___ .
【单选题】
Greater efforts to increase agricultural production must be made if food shortage ______ avoided.
【单选题】
There was a knock at the door. It was the second time someone _____ me that evening.
【单选题】
He didn’t show up at the party yesterday. He ____ in the lab.
①
must have been busy working
④
would have been busy working