表面半透明,红棕色,偶有不透明的暗的答案
表面半透明,红棕色,偶有不透明的暗黄褐色斑块,具纵沟、皱纹及细根痕的药物是
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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