题干
Nowadays, many people walk to work ________ Copenhagen Conference calling for living a low-carbon lifestyle to cope with global warming.
A：in relation to
B：in response to
C：in addition to
D：in opposition to
答案(点此获取答案解析）
B
（量程为 2.5mA，内阻为 Rg=10.0Ω）
,满足
的函数
可以
，对任意
，总有
，则
（ ）