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【单选题】
在简单停-等协议中,发送方要等待接收发会的确认才能发送下一帧,当帧出现丢失时,为避免发送端会永远等待下去,采用的办法是( )。
A.
差错校验
B.
超时机制
C.
帧序号
D.
否定确认机制
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参考答案：
举一反三
【单选题】My father was very _______ when he heard the good news [     ]
A.
excite
B.
exciting
C.
excited
D.
sad
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【单选题】My father was very angry. And he hit me _____ the face
A.
from
B.
of
C.
with
D.
in
查看完整题目与答案
【判断题】听音,判断正误,正确的写“√”,错误的写“×”。 4. My father was very handsome.
A.
正确
B.
错误
查看完整题目与答案
【单选题】My father was very excited ____ he heard the news.
A.
after
B.
when
C.
until
D.
while
查看完整题目与答案
【单选题】My father was very ______________ in me for choosing acting instead of a legal career.
A.
disappointing
B.
disappointed
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【简答题】My father was very angry because__________.
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【单选题】胸椎后凸何时出现
A.
两个月
B.
四个月
C.
六个月
D.
八个月
E.
十个月
查看完整题目与答案
【多选题】My father was very hard-working because ___________
A.
he went to work even if there was a bad weather.
B.
he went to work even when he was ill.
C.
he never talked about himself as an object of pity.
D.
he made a great effort to joined the Navy.
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【简答题】My father was very strict with me, so nothing I did would ever him.
查看完整题目与答案
【判断题】CDMA2000 1x 基站满载时,由于呼吸效应,该站的覆盖范围会缩小、软切换区增大。
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【单选题】My father was very _______ when he heard the good news [     ]
A.
excite
B.
exciting
C.
excited
D.
sad
查看完整题目与答案
【单选题】My father was very angry. And he hit me _____ the face
A.
from
B.
of
C.
with
D.
in
查看完整题目与答案
【判断题】听音,判断正误,正确的写“√”,错误的写“×”。 4. My father was very handsome.
A.
正确
B.
错误
查看完整题目与答案
【单选题】My father was very excited ____ he heard the news.
A.
after
B.
when
C.
until
D.
while
查看完整题目与答案
【单选题】My father was very ______________ in me for choosing acting instead of a legal career.
A.
disappointing
B.
disappointed
查看完整题目与答案
【简答题】My father was very angry because__________.
查看完整题目与答案
【单选题】胸椎后凸何时出现
A.
两个月
B.
四个月
C.
六个月
D.
八个月
E.
十个月
查看完整题目与答案
【多选题】My father was very hard-working because ___________
A.
he went to work even if there was a bad weather.
B.
he went to work even when he was ill.
C.
he never talked about himself as an object of pity.
D.
he made a great effort to joined the Navy.
查看完整题目与答案
【简答题】My father was very strict with me, so nothing I did would ever him.
查看完整题目与答案
【判断题】CDMA2000 1x 基站满载时,由于呼吸效应,该站的覆盖范围会缩小、软切换区增大。
A.
正确
B.
错误
查看完整题目与答案
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