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【单选题】
数据在通信线路上传输是有方向的,___,数据可以双向传输,但不能同时进行,在任一时刻只允许在一个传输信息。A.
通信
B.
半双工通信
C.
全双工通信
D.
双工通信
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【多选题】下列关于定性调研的描述正确的有( )。
A.
属于探索性调查
B.
要做一些数量计算
C.
不需要抽取概率样本
D.
由调查人员主观地找一些人来接受调查就可以了，而且人数不需要很多
E.
调研结果可以用来推断总体
【多选题】以下 对探索性调研描述正确的 有 ( )
A.
探索性 调研一般在调研早期进行
B.
探索性 调研 需要 提出假设
C.
它还 可以被用了 使 调研人员更加熟悉问题
D.
调研在增长见识和建立假设方面具有灵活性的特点
【简答题】With the rapid development of the Internet, more and more people have access to it for information, entertainment and even education. As a new means of education, online education has caused much publ...
【简答题】With the development of the society, more and more ordinary people are engaged in charity activities. Accordingly, a new form. of charity comes into being, that is, micro-charity, in which ordinary pe...
【判断题】It is regarded that money supply is good to the economic development , the more the better.
A.
正确
B.
错误
【简答题】概述江南古镇空间构成特点。
【判断题】The more development you want to make, the more failure you might encounter. So, people are facing with failure now and then.
A.
正确
B.
错误
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