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【单选题】
关于无连接的通信,下面描述中正确的是( )。A.
目标的地址信息被加在每个发送的分组上
B.
由于通信对通信线路都是预设的,所以在通信过程中无须任何有关连接的操作
C.
无连接的通信协议UDP不能运行在电路交换或租用专线网络上
D.
由于为每一个分组独立地建立和释放逻辑连接,所以无连接的通信不适合传送大量的数据
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【简答题】Children’s Museum of Indianapolis We are the largest children’s museum in the world. Hours Monday: Closed (闭馆) Tuesday — Sunday, 10 a.m. — 5 p.m. Admission (门票费) Children (ages 2 — 17): $13.50 ...
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【单选题】The survey conducted by theC．S．Mott Children’S Hospital National Poll on Children，sHealth indicates that______．
A.
30％of children respondents are subjected to eating disorders to varying degrees
B.
There is a direct link between anti．obesity program and children，s eating disorder
C.
anti-obesity programs serves as an effectively reminder of how vulnerable children are to eating disorders
D.
many children are under the risk of eating disorders and the whole society must pay special attention to this problem
【单选题】Importance of Children's Oral Health February is National Children's Dental(牙齿的) Health Month, but in children good oral(口部的) care is critical every day. The first comprehensive study on the nation's ...
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】Charity Navigator gives the same stars to Children's Cancer Center and the Children's Cancer Research Fund.
A.
Y
B.
N
C.
NG
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