问题
选择题
如图表示一交流电的电流随时间而变化的图象,此交变电流的有效值是( ) A.5A B.5A C.3.5A D.3.5A |
答案
答案:B
如图表示一交流电的电流随时间而变化的图象,此交变电流的有效值是( ) A.5A B.5A C.3.5A D.3.5A |
答案:B
从方框中选出能填入空白处的正确答案。 | |
A: 1______ B: I like music that isn't too loud. A: 2______ B: I listened to one called Heart String. A: 3______ B: I enjoyed it a lot. A: 4______ B: Some songs are too long. Some of the singers don't sing the words clearly. A: 5______ B: The CD reminds me of my old friends. | |
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