-I heard Back Street Boys would sing at the New Century Theatre.

-Where did you _________?     [ ]

A. pick that up                  

B. put that up    

C. make that up                

D. take that up

工程分析时，计算结果大多数情况下数值偏低，不利于提出合适的环境保护措施的分析方法是( )。

A．物料平衡计算法

B．专业判断

C．查阅参考资料分析法

D．类比分析法