问题
填空题
EIA RS-232C是一种广泛使用的串行物理接口标准，其电气特性规定逻辑“1”电平为_____伏。
答案
参考答案：
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EIA RS-232C是一种广泛使用的串行物理接口标准，其电气特性规定逻辑“1”电平为_____伏。
参考答案：
Do you know S. H. E? It is a group Taiwan, China. There are lovely girls in it. They Selina, Hebe and Ella. They are very popular. Lots of girls like Selina because she is very . She has long straight hair. She is of medium and thin. Ella is cool! She looks a boy. She is of medium height and a little heavy. She always short, straight hair and a jacket. Many fans think she sings very well. Hebe is a nice girl. She isn’t tall and she is of medium build. She has long, straight hair, too.
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