【判断题】相对于继电器接触器控制系统,PLC具有可靠性高,抗干扰能力强的特点。
【判断题】“一两的遗传胜过一顿的教育”这是华生的典型论述
【单选题】( )是电子商务系统遭受部分或全部电脑资源与物理设施损失时,提供应急响应、延长备份运行以及灾后恢复的程序。
【判断题】灾难拯救计划是电子商务系统遭受部分或全部电脑资源与物理设施损失时,提供应急响应,延长备份运行以及灾后恢复的程序。
【单选题】关键词替换的步骤不包括下列()
C.
做关键词的混合、匹配、替换新词,形成新的主题描述
【单选题】对于继电器接触器控制系统,PLC具有的特点是( )。
【单选题】电子商务对系统的可靠性要求很高,( )是电子商务系统遭受部分或全部电脑资源与物理设施损失时,提供应急响应、延长备份运行以及灾后恢复的程序。
【单选题】在图示电路 中,各电阻值和 U S 值均已知。欲用支路电流法求解流过电压源的电流 I ,列出独立的电流方程数和电压方程数分别为 ( ) 。 得分/总分
【单选题】If we view a science as a body of systematized knowledge, then chemistry is usually called a natural science because it 【C1】______ knowledge of the natural world. At times we may wonder 【C2】______ the...
【单选题】Which of the following choices is TRUE?
A.
Journalists must double-check the facts they report and make sure the evidence supports them. That is all that is required.
B.
Since it’s not professional for journalists to tell about, or even comment on the central character , it’s a good idea to use quotations to show, to let the character talk directly to the readers.
C.
Brevity means journalists strive to make every sentence short in a news item.
D.
I n news writings, journalists are not allowed to use an assumed name , such as "Tony" or "Julia" , for a person involved, as journalists should always report about the truth.