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单选题
The resistance experienced when one body moves over another, ______ it is in contact, is called frictional force.
A
to which
B
where
C
with which
D
while
参考答案
参考解析
解析：
当一个物体在和它接触的物体上运动时，产生的阻力叫做摩擦力。in contact with 与…联系，接触。此处，which引导定语从句，修饰another，从句中的it指one body。
当一个物体在和它接触的物体上运动时，产生的阻力叫做摩擦力。in contact with 与…联系，接触。此处，which引导定语从句，修饰another，从句中的it指one body。
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