问题
单项选择题
在采样试验中,如果某工作岗位有12名劳动者,在能确定和不能确定接触有害物质浓度最高和接触时间最长的劳动者时,采样对象分别是()名。
A.2,3
B.3,4
C.4,7
D.7,10
答案
参考答案:C
在采样试验中,如果某工作岗位有12名劳动者,在能确定和不能确定接触有害物质浓度最高和接触时间最长的劳动者时,采样对象分别是()名。
A.2,3
B.3,4
C.4,7
D.7,10
参考答案:C
Passage Two
What can be inferred from the passage
A.In the 21st century, Asia will become the center for the world economy.Z
B.Internet is a major driving force for the spread of the English language.
C.Computers have become extensively networked into the Internet.
D.The Internet has been serving local, cultural, commercial and educational purposes.