工程归档文件的内容要求必须（）。
A.真实
B.准确
C.签章齐备
D.反差明显
E.字迹清楚
参考答案：A, B, C
Many of the big world sports events are _______by wealthy big companies, who hope to advertise their companies or their products. [ ]
A. organized
B. arranged
C. hosted
D. sponsored
冷轧的概念是（）。
A.在再结晶温度以下进行轧制
B.在再结晶温度以上进行轧制
C.在室温下轧制
