按这种方式使用的二极管叫做整流管.A diode used in this manner is called a rectifier.整流器;整流管:一种将交流电流转化为直流电流的装置, 如二极管.A device, such as a diode, that alternating current to direct current....
"It's" (with an apostrophe) should be used only as a contraction for "it is".it's（带撇号）只能用作itis的缩约形式。Answer these questions, using the words in parentheses. Put the apostrophe in the right place.用句后括号中的词或词组来回答问题...
My bulging thighs and flabby stomach made me depressed.我大腿太粗，肚子上也净是赘肉，让我很发愁。He isn't just fat, he's flabby.他不光是肥胖, 而且肌肉松弛.His eyes were not keen, his face marked, his hands flabby.他目光呆滞, 满脸皱纹, 双手无力....
He was quiet, conscientious, a bit of a plodder.他做事闷声不响，小心谨慎，有点死气沉沉的。She is very conscientious and never skimps her work.她办事认真,从不敷衍了事.We are generally very conscientious about our work...我们普遍对工作都非常认真。She has received sev...