起重作业中，常用的麻绳为（）。
A.混合绳
B.黄麻绳
C.白综绳
D.白纱绳
参考答案：C
—Was Lingling born in Xiamen?
— . She was born in Qingdao. [ ]
A. Yes , she was
B. No , she wasn't
C. Yes , she wasn't
D. No , she was
现代战略采购的特点是（）。
A.长期的
B.对抗竞争关系
C.合作伙伴关系
D.多家供应商
E.很少的供应商
