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【单选题】
脐带中含有静脉的数量为A.
1条
B.
2条
C.
3条
D.
4条
E.
6条
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反馈参考答案：
举一反三
【简答题】具有五层协议的网络体系结构与OSI模型的区别是什么?OSI模型在ISO和GB标准体系中是哪些?分别定义了什么?为什么单纯的从七层角度理解OSI模型是片面的?
【单选题】A car in a drag race started from rest and accelerated constantly to a velocity of 50 m/s when it reached the end of a 500-m road. What was the car’s rate of acceleration?
A.
−5.0 m/s2
B.
−2.5 m/s2
C.
0.5 m/s2
D.
2.5 m/s2
E.
5.0 m/s2
【单选题】— I've had a stomachache for two weeks. — You ____ to the doctor when it started. [ ]
A.
must go
B.
should go
C.
ought to have gone
D.
might have gone
【单选题】A car in a drag race started from rest and accelerated constantly to avelocity of 50m/s when it reached the end of a 500m road. What was thecar’s rate of acceleration?
A.
−5.0 m/s 2
B.
−2.5 m/s 2
C.
0.5 m/s 2
D.
2.5 m/s 2
【简答题】The period of engagement is the time between the marriage [S01] ________ and the wedding ceremony. Two people agree to marry when they decide to spend their lives together. The man usually gives the w...
【多选题】对新生使用图书馆,有专门的服务通道:
A.
新生入馆培训及参观图书馆等系列活动
B.
通过图书馆网站
C.
新生手册、图书馆微信、馆内张贴的海报
D.
图书馆首页->新生专栏
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