问题
单项选择题
Heat is always being transferred in one way or another, () there is any difference in temperature.
A. since
B. where
C. after
D. as soon as
答案
参考答案：B
解析：
where在句中是连接副词，意为：“在……地方”。题句意为：“凡是有温差的地方，热都会以这样或那样的方式传导。”