下列施工成本分析方法中，可以用来分析各种因素对成本影响程度的是（）

A．相关比率法 

B．连环置换法 

C．比重分析法 

D．动态比率法

When a high pressure system is centered north of your vessel in the Northern Hemisphere（）.

A.You should experience hot，moist，clear weather

B.The wind direction is generally easterly

C.The winds should be from the southwest at your location

D.The winds should be brisk