【简答题】_____ ______ are documents, reports, recordings, or other sources of information that are created most probably through investigation, experiments and field studies.
【单选题】下面关于电子邮件系统叙述错误的是()
A.
电子邮件的客户 不 需安装 专门的 电子邮件程序, 也能 发送和接收邮件
B.
用户邮件发送时,邮件传输程序必须与远程的邮件服务器建立连接,并按照 SMTP协议传输邮件
C.
用户接收邮件是按照 POP3协议向邮件服务器提出请求,通过身份验证后,便可对自己的邮箱进行访问
D.
邮件服务器负责接收邮件并存入收件人信箱,以及识别用户身份,进行访问控制,不需要执行 SMTP,POP3协议
【单选题】Compared to lab experiments, field experiments:
A.
are more controllable.
B.
take lesser time to complete.
C.
more expensive to conduct.
D.
are more effective in maintaining secrecy.
【单选题】下面关于POP3,______是错误的。
C.
协议是基于ASCII码的,不能发送二进制数据
【单选题】下面关于电子邮件系统的叙述中错误的是( )
A.
SMTP协议只能传送ASCII格式的文本信息
B.
alice@qq.com发送给bob@163.com的邮件将从alice的终端直接送到163.com的邮件服务器上
C.
SMTP是一种“推”协议,POP3是一种“拉”协议
D.
MIME的重要作用是把非ASCII数据转换成ASCII数据
【判断题】Wesley Smith has done many experiments in the field of science and ethics.
【单选题】Field experiments feature which of the following?
C.
high external validity
【多选题】在中国社会主义建设道路初步探索中,毛泽东提出的重要理论观点包括( )。
D.
我国还处于并将长期处于社会主义初级阶段的思想
【单选题】How is the research of Messe and Callahan-Levy related to earlier experiments in the same field?
A.
It suggests a need to discard methods used in earlier experiments.
B.
It tends to weaken the assumptions on which earlier experiments were designed.
C.
It suggests that the problem revealed in earlier experiments may be more widespread than previously thought.
D.
It helps to explain a phenomenon revealed in earlier experiments.