【单选题】城市生态系统是一种特殊的生态系统,以下对城市生态系统的认识不正确的是( )。
D.
城市生态系统受到自然规律和人类社会的叠加影响
【简答题】A. People differ greatly in their ability to communicate B. There are numerous languages in existence C. Most public languages are inherently vague D. Big gaps exist between private and public languag...
【判断题】设计测试用例最最困难的问题是设计测试的输入数据。 ()
【简答题】测试用例由测试输入数据和与之对应的预期输出结果组成。人们常用白盒法和黑盒法设计测试用例,其中白盒法主要是为了检查______等。 A.是否有错误的功能或遗漏的功能 B.性能是否能够接受 C.是否有数据结构或外部数据库访问错误 D.程序内部结构是否有效 A. B. C. D.
【判断题】已知两正弦交流电流 i1 = 5 sin( 314t+60 ° ) A , i2 = 5 sin( 314t - 60 ° ) A ,则二者的相位关系是反相。
【单选题】S7-200CPU224 PLC处于运行状态时哪个指示灯点亮?
【单选题】近代中国社会进步和发展的最大障碍,遭受的最大的压迫,也是近代中国贫困落后和一切灾难祸害的总根源是来自()的压迫,所以它是中国革命的首要对象。
【单选题】Which of the following statements best explains the meaning of “false friends” in the passage?
A.
People who seem to be your friend, but who are not loyal and cannot be trusted.
B.
Pairs of words in two languages or dialects that look or sound similar, but differ in meaning.
C.
Pairs of words in two varieties of languages that share the same meaning, but differ in spelling.