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【单选题】
下列关于同步方式、异步方式说法错误的是( )A.
异步方式：发送端先将信息分成一个一个的字符，对每个字符在发送前又进行包装，在每个字符前端插入起始位、末端插入停止位，构成10bit /字符的结构发送出去
B.
异步方式：接收端处在随时接收数据的等待状态，一旦收到启始位即提醒进入短时间的收发同步状态，在收到停止位时，能确认字符接收完毕，并准备下一个字符的接收
C.
同步方式：将要发送的字符数据集中批量发送，省去字符前起止位的提醒，大大提高了数据传输的效率。
D.
同步方式：发送端和接收端不需要一致的时钟信号
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举一反三
【单选题】肺结核的临床表现是
A.
反复发作性呼气性呼吸困难
B.
发热伴有刺激性干咳
C.
咳大量脓痰或反复咯血
D.
发热、咳嗽、肺部固定性细湿啰音
E.
咳嗽、午后低热、乏力、盗汗、消瘦
【单选题】肺结核的临床表现是
A.
反复发作性呼气性呼吸困难
B.
发热伴刺激性干咳
C.
咳大量脓痰或反复咳血
D.
咳嗽、午后低热、乏力、盗汗、消瘦
E.
发热、咳嗽、肺部固定性细湿罗音
【多选题】肺结核的临床表现是
A.
反复发作性呼气性呼吸困难
B.
发热伴刺激性干咳
C.
咳大量脓痰或反复咯血
D.
发热、咳嗽、肺部固定性细湿啰音
E.
咳嗽、午后低热、乏力、盗汗、消瘦
【单选题】-----What were you up to when she dropped in? ------I______ for a while and _____ some reading.
A.
had played ; did
B.
played; did
C.
had played :was going to do
D.
was playing; was going to do
【单选题】Considering all that she had _______, she was really an amazingly cheerful woman.
A.
gone for
B.
gone through
C.
gone in for
D.
gone about
【单选题】They knew that things weren't right at home．It means ．A． Bob had no food to give th
A.
27． They knew that things weren't right at home．It means ． A． Bob had no food to give them
B.
Bob couldn't open the door
C.
it was very cold outside
D.
they were too young to eat anything
【简答题】肺结核的临床表现:
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