[单选题]导线接头电阻要足够小,与同长度同截面导线的电阻比不大于( )。
A.2
B.5
C.1

{{B}}Stress in College{{/B}}
Most students in US colleges are just plain stressed out, from everyday worries about grades and relationships to darker thoughts of suicide, according to a poll of undergraduates from coast to coast. The survey was conduced for the Associated Press and MTVU, a television network available at many colleges and universities.
{{B}}Students’ Stress Problem{{/B}}
Four in 10, students say they endure stress often. Nearly one in five say they feel it all or most of the time. But most are bearing it. Nearly 60% in the survey say they enjoy life.
The majority cite classic stress symptoms including trouble concentrating, sleeping and finding motivation. Most say they have also been disturbed, worried, too tired to Work. "Everything is being piled on at once," said Chris Curran, a junior at the Albany College of Pharmacy (制药) in Albany,
A. Nearly 20%.
B. Nearly 40%.
C. Nearly 60%.
D. Nearly 80%.