A . 50~60Hz
B . 50~70Hz
C . 50~80Hz
D . 50~90Hz
查看答案
Studies show that otherwise rational people act irrationally when forced to stand in line or wait in crowds, even becoming violent.(英译中)
When prices range from $34,500 to $50,000 per car, evidence that these machines are more than a cut above the rest is essential.(英译中)
The world is scraping bottom in the deepest economic slump in a half-century.(英译中)
I have a dream that my four little children will one day live in a nation where they will not be judged by the color of the skin but by the content of their character.(英译中)