什么是被控制系统？
参考答案：
由调速器所控制的系统，它包括水轮机、引水和泄水管道、装有电压调节器的发电机及其所并入的电网。
What is the main problem with Sony().
A. Sony has lost touch in terms of design and innovation.
B. Sony can not be able to make a Hitchcock film.
C. Sony can not operate well under the new foreign CEO.
D. Sony had many competitors like the iPods, the Samsungs, and competitors in different industries
