26. 员工的基本医疗保险费由单位和个人共同负担,用人单位和职工个人按工资收入的一定比例共同缴纳,其中个人缴纳额为其工资收入的( )
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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