单选题
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
【正确答案】
B
【答案解析】
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。”
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