填空题____
填空题
____
参考解析
解析：
occur。考点:动词。occur表示“一个事件的发生”。arise表示“某个问题出现”。此处these指的是前文说到的儿童死于二手烟的这些“事件”，故应选O项occur。
occur。考点:动词。occur表示“一个事件的发生”。arise表示“某个问题出现”。此处these指的是前文说到的儿童死于二手烟的这些“事件”，故应选O项occur。
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