(1)、 [单选题]Directions: This part is to test your ability to translate English into Chinese. Choose the best answer from the suggested translation marked A), B), and C).The aim of our website is to control or reduce noise at work without stopping people from enjoying music.
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We have all been so impressed with your abilities and potential that we are pleased to offer you a position.
Anything you want to know can be found in seconds if you use the right keywords to search for it.
We deal with a lot of foreign customers and are considered to be one of their most reliable agents.
下列叙述正确的是。
A. 实际电压源和实际电流源不能等效变换
B. 实际电压源和实际电流源变换前后内部不等效
C. 实际电压源和实际电流源变换前后对外不等效
D. 理想电压源与理想电流源存在等效变换