地图符号的视觉变量中最活跃的变量是（）。

圆锥投影适合用来编制（）地区的地图。

A.高纬地区
B.中纬度沿纬圈伸展
C.中纬度沿经圈伸展
D.赤道附近

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Neither Jane nor Ted （）going to meet Professor Jones next Friday because both of them will be busy with their classes then.

A.are
B.were
C.is
D.was

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