[单选题]进入危险化学品泄漏事故现场或有传染疾病危险的区域时,( )作业人员根据需要必须着特级或一级防化服。
A.重危区
B.中危区
C.轻危区
D.安全区

Directions:
Read the following text carefully and then translate the underlined segments into Chinese. Your translation should be written clearly on ANSWER SHEET 2.T
here can be no doubt that the computer revolution has touched virtually every person in the country in some way or other.
Nor can there be any doubt that it has brought tremendous improvements in productivity and efficiency. 46)Indeed, there are many tasks undertaken by computers that could not be done without them, and we have reached the point that the benefits of computerization are taken for granted.
Having accepted that computers are here to stay, what is the downside 47)The most obvious answer is that because of increased efficiency, less people are needed and the loss of jobs, particularly in the service industries, has been enormous, with more job losses yet to come.
However, on a more insidious note, many users have not realized how computers have