价格的变化容易失去消费者的信任,所以产品的价格一旦确定就不能再改动。
参考答案:错
The ______ is a collection of modules serving as interface between hardware and software to provide a software platform.
A.computer
B.processor
C.application software
D.operating system
以下哪个部件不属于液力变矩器的组成()。
A、导轮
B、行星齿轮
C、涡轮
D、泵轮