在力的作用下,使物体的机械运动状态发生变化称为力内效应。
参考答案：错
In the past few years, “My Heart Will Go On” was a popular song among young people, ____ were often heard singing it at parties.
A．who
B．where
C．which
D．what
委托开发商办理公积金贷款，我如何才能查到他们什么时候帮我提交的资料？现在进度如何？另外什么是放款？咨询电话多少？
