填空题

It is ____________(当物体加热时) that the average speed of molecules is increased.

【参考答案】

when an object is heated
<上一题 目录 下一题>
热门 试题

单项选择题
A．ingredientsB．elementsC．componentsD．factors
A．ingredients
B．elements
C．components
D．factors
单项选择题
A．ratherB．lessC．moreD．very
A．rather
B．less
C．more
D．very
相关试题