()是指教师在幼儿社会教育中,通过言语、动作或表情等方式,对儿童的行为给予肯定或否定的评价,使之增强、巩固或削弱、消除,以便形成良好的行为习惯
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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