锻件的公称尺寸是在零件的（）上，加上粗加工和精价格余量以后得到的尺寸。
参考答案：公称尺寸
Olympic torch relay around the world
The Beijing 2008 Olympic Torch Relay (火炬接力) will travel the longest distance, cover the greatest area and include the largest number of people. On March 25,Olympic Flame (火种)will be lit (点燃) in Greece.
Route Distance: 137 000 km Time: 130 days
Route:March 31,Torch Relay starts in Beijing→.London→Paris→San Francisco.. →Hong Kong..→Beijing
Torch Length:72 cm Torch Weight:985 grams Design: It is based in the shape of a paper scroll (卷) with lucky clouds on it.
It can stay lighted (燃烧的) in bad weather conditions.
根据以上信息填空，每空填一词。
The Beijing 2008 Olympic Torch Relay will travel a 小题1:(76) distance than before. It will take more than 小题2:(77) months to travel around the world. The Torch Relay will start in the city of小题3:(78) . The torch is 小题4:(79) cm long and 985 grams heavy. It looks like a paper scroll. Bad weather can’t 小题5:(80) the torch from burning.
读我国主要商品粮基地图，完成下列各题。
（1）填写九大商品粮基地的名称：①_______________②_______________③_______________④_______________⑤_______________⑥_______________⑦_______________⑧_______________⑨_______________
（2）在九大商品粮基地中，不是位于第三段阶梯的是_______。（填序号）
