皮皮学，免费搜题
登录
搜题
【单选题】
下面关于星型拓扑结构描述正确的是()A.
是早期的以太网采用的一种拓扑结构
B.
特点是每个端用户都与两个相邻的端用户相连，并且数据传输具有单向性，一个端用户发出的数据中能被另一个端用户接收并转发
C.
多台机器共用一条传输信道，信道利用率较高，但是同一时刻只能由两台计算机通信
D.
结构简单，便于管理（集中式），不过每台入网主机均需要与中央处理设备互联，线路利用率低
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】The first compass, called a sinan, was invented __________.
A.
in the Han Dynasty
B.
in the Western Zhou Dynasty
C.
in the Shang Dynasty
D.
during the Warring States Period
【单选题】According to ancient records, natural magnets were employed in China as direction-finding devices. This led to the first compass, called ( ) during the Warring States Period.
A.
Si Nan
B.
wet compass
C.
dry compass
D.
navy compass
【单选题】What was the purpose when the magnetic compass was first invented?
A.
Divination.
B.
Navigation.
C.
Enjoyment.
D.
War.
【单选题】According to ancient records, natural magnets were employed in China as direction-finding devices. This led to the first compass, called ( ) during the Warring States Period.
A.
wet compass
B.
Si Nan
C.
dry compass
D.
navy compass
【单选题】Nearly two thousand years have passed______ the Chinese first invented the compass.
A.
when
B.
before
C.
since
D.
after
【单选题】创建网页中的拖动层行为效果,要选择事件为鼠标移动到对象上面是( )。
A.
OnClick
B.
OnMouseup
C.
OnMousetop
D.
OnMouseOver
【单选题】According to ancient records, natural magnets were employed in China as direction-finding devices. This led to the first compass, called ____during the Warring States Period.
A.
Si Nan
B.
navy compass
C.
wet compass
D.
dry compass
【简答题】为80C51单片机扩展行列式按键，1个并行口最多可以扩展______个按键。
相关题目：
参考解析：
知识点：
题目纠错 0
发布
