同类色的配合,可使人感到协调柔和、含蓄雅致,但也易于产生过于单调平淡的感觉,因此在同类色的运用中要有意识的加强色彩之间的()对比。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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