【简答题】A linguistic (1) is a linguistic item which has identifable (2), which are the different forms which can be used in an environment. For example, words like singing and fshing are sometimes pronounced ...
【判断题】常用提高感性负载功率因数的方法是在其两端并联一个容量合适的电容器。
【判断题】( )提高功率因数的方法是在负载并联一个大电容。
【简答题】废气再循环(Egr)就是将()中的一部分引入燃烧室中参与燃烧过程。EGR电控系统的功能主要是根据()的运行工况控制EGR率,在大负荷或者()时,发动机不进行废气再循环,而在其他工况下,随进气量的(),EGR量也()
【判断题】提倡在创新面前人人平等,不人云亦云,不信奉权威,不论资排辈;尊重知识、尊重实践、尊重人才,尊重创新。
【判断题】通过图像平滑运算,可以完全消除图像中的噪声。
【判断题】发动机废气再循环(EGR)控制就是在发动机各种工况下,将部分废气导入进气管,以减少排气中NOx的含量。
【单选题】It can be inferred from the passage that______.
A.
light waves could be used in a device similar to radar
B.
radar was a practical application of a well-known principle
C.
radar gready increased the effectiveness of the Royal Air Force
D.
sound waves are reflected from a hillside under all conditions