皮皮学，免费搜题
登录
搜题
【单选题】
波特率等于A.
每秒传输的比特
B.
每秒钟可能发生的信号变化的次数
C.
每秒传输的周期数
D.
每秒传输的字节数
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】色阶命令的快捷键是?
【简答题】写出各零件名称? 模具采用何种浇口形式? 模具采用何种冷却系统? 件11、14的作用是什么? 模具有几个分型面? 叙述模具工作原理。
【单选题】听力原文：M: Bill has tried so hard to wm the race since he flint joined the track team, but it's two years later and he still hasn't. W: I know, and it takes so much time from his class work. Maybe he sho...
A.
Bill has won the race.
B.
Bill is a student.
C.
Bill has enough time to deal with his class work.
D.
Bill is a sportsman.