【单选题】In an assembly drawing, there are 6 nuts which are used in bolt joints, and there is another nut which has the same size and of the same type with the others, and then how many part nubmer should be g...
【简答题】How many competitors from how many country take part in the 27 th Summer Olympics in Sydney?A. Over
10,000 athletes; 119 countries B. Over
10,000 athletes; 184 countries