【简答题】根据句意及汉语或首字母提示,填写单词。 1. These ________(村民) here are rich now. 2. At last, the soldier made a ________(步) forward and then fell. 3. We need to improve relations (关系) with foreign ________(政府). 4. Brazil...
【判断题】管道的公称通径又称为公称直径,是管子、管件、附件等部件的标准直径,即内径而非外径。
【简答题】Listening is one of the most important skills we can ever learn and an essential part of communication; not only does it help you to build close relations with other people, it’s also away of showing ...
【判断题】对外螺纹来说螺纹大径即螺纹顶径,称为公称直径