19.利用盐酸左西替利嗪片治疗慢性特减发性荨麻疹临床试验,以西替利嗪片组作为对照组,治疗28天后结果如下表,现要比较两种药物的治疗,何种方法为优:()表1盐酸左西替利嗪片治疗慢性特发性荨麻疹临床疗效
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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