单项选择题

MOOC is now quite popular ________ college students. A.
in B.
with C.
for D.
on

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单项选择题

A scientific study of language is based on what the linguist thinks.

A．对
B．错

是指物体在单位厚度间、保持单位温度差时，其相对的两个面在单位时间内通过单位面积的热流量。

答案：导热率或热导率