钢管混凝土拱桥钢管内填芯混凝土宜选用高标号。
A. 对
B. 错
How long did Wang Lei work for the foreign trade company according to the conversation?
A. Two days
B. About 10 days
C. Nearly two years
D. Nine months
劲性骨架浇筑混凝土拱圈，主要用于大跨径拱桥，无支架悬挂模板现浇。
A. 对
B. 错
What exactly did he do at the company?
A. Visited customers
B. Dispatched consignments
C. Translated articles
D. Visited customers, dispatched consignments and things like that
微信支付 
支付宝支付