皮皮学，免费搜题
登录
搜题
【多选题】
简单表决器功能,以下说法正确的有( )A.
只按下S2、S3，LED1灯不亮，蜂鸣器无声，表决不通过
B.
S1、S2按下，LED1灯亮，蜂鸣器发出声音，表决通过
C.
S1、S3按下，LED1灯亮，蜂鸣器发出声音，表决通过
D.
同时按下S1、S2、S3，LED1灯亮，蜂鸣器发出声音，表决通过
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】阅读理解。 Expo 2010 is held in Shanghai from May 1 to October 31. People all over the world are looking forward to it. Here are several golden rules on how to best plan your trip. Rule 1: Do your homework...
【简答题】阅读理解。 Expo 2010 is held in Shanghai from May 1to October 31.People all over the world are looking forward to it. Here are several golden rules on how to best plan your trip. Rule 1: Do your homework R...
相关题目：