()heavy commitments, we cannot accept any fresh orders.
A. Due
B. Owing to
C. Because
D. In addition to
sl石化总厂重油催化装置外取热器的型式是()
A. 上流式
B. 下流式
C. 气控内循环式
D. 气控外循环式
We are not in a position to make any offer as the goods are().
A. with out stock
B. out of stock
C. no stock
D. not in stock
()是一种客观地综合多数专家经验与主观判断的技巧。
A. 特尔菲测定法
B. 因素成对比较法
C. 层次分析法
D. 数理统计法