煤气清洗中，文氏管是（）除尘设备。 A.精细 B.半精细 C.粗

I _________ giraffes and elephants.[ ]

A. like              

B. do                   

C. have

返矿在烧结过程中的作用。

非霍奇金淋巴瘤的分期检查中，骨髓穿刺或活检()

A．常规做

B．不做

C．血象的异常者做

D．ESR高者做

E．Ⅲ、Ⅳ期病人做

薄层色谱检识黄酮类化合物时，常用的显色试剂有

A．2%三氯化铝甲醇液

B．2%三氯化铁-1%铁氰化钾(1:1)水溶液

C．5%碘化铋钾甲醇液

D．2%硝酸银水溶液

E．10%茚三酮水溶液

（）involves comparing actual or planned project practices to those of other projects to generate ideas for improvement and to provide a basis by which to measure performance. These other projects can be within the performing organization or outside of it, and can be within the same or in another application area.

A.Metrics

B.Measurement

C.Benchmarking

D.Baseline