【单选题】It is useful to be able to predict the extent _____ a price change will affect supply and demand.
【单选题】下列不适用于药剂工业生产干燥方法是( )
【单选题】关于传感器场地定标的说法正确的是
A.
场地辐射定标的作用,是将遥感影像所记录的DN值转换为地表目标的反射率
B.
场地辐射定标的作用,是将遥感影像所记录的DN值转换为进入传感器的辐射亮度
C.
场地辐射定标的作用,是将地面目标反射率转换为进入传感器的辐射亮度
D.
场地辐射定标的作用,是将进入传感器的辐射亮度转换为地面目标的反射率
【单选题】It is easy to______ one state of matter from another.
【简答题】At Penn State University, engineers have designed aircraft wings that can change shape in different phases of flight, ______.