企业安全率是由两个因素交集而成:一是经营安全率,二是资金安全率。()
查看答案
在地震区,配筋砌块砌体剪力墙的厚度,在任何情况下都不应小于以下何值?()
A. 120mm
B. 180mm
C. 190mm
D. 240mm
They found the conditions there ______.
A. much improve
B. much to improve
C. much improved
D. be much improved
汇款人对已汇出的款项申请撤销的行为称为汇兑的撤销。()
A. 正确
B. 错误
听力原文: Have you ever encountered a system breakdown because of a computer crash? It may have started from a single Infectious file which runs through every computer in the world. And such a nasty computer virus is known to freeze the main operating system temporarily and hide within it to reproduce itself into a bigger infection, resulting in file deletion.
You should then subscribe to our anti-virus service, which provides 24-hour, worry-free protection through on and off line scanning. It has an automatic update function which can be done even during virus outbreaks. Our program will safely isolate and neutralize any infected files and restore lost files. Our online service also includes chat-based support from our certified technicians 24 hours a day. There are several system requirements on your computer however. Any interested customers must be using a computer with a 486 or higher processor and have at least 256 megabytes of RAM. Windows XP is preferred but not required. A one-year subscription costs only $49.99, so don't delay! We urge you to protect your computer as new and more powerful virus threats appear constantly.
7 What is being advertised?
A new computer.
B. A new chat site.
C. A computer store.
D. An anti-virus software program.