【简答题】世界上第一个把圆周率推算到小数点以后第七位的我国古代数学家叫什么?
【简答题】世界上第一个把π计算到3.11415926
【单选题】Though the aerospace industry has made greater progress in China, the scientists will not _________ themselves ___________ this status.
【单选题】The following countries are the rising stars in the aerospace industry EXCEPT
【简答题】A for B at C inD with
【单选题】The largest aerospace company in the world is _______.