A. may have problems with their hearing B. usually pay close attention to what they hear C. often take a long time in learning, to listen properly D. probably do not hear enough language spoken around them 参考答案:C 答案解析:[解析] 推理判断题。文章第一段第二句提到late starters are often long listeners(学说话越迟，孩子听的时间就越长)，解答此题的关键是理解long listener
第22题: [单项选择]不符合手术进行中无菌原则的操作是 A. 手术者肩以上应视为污染区 B. 不可在手术人员背后传递无菌物品 C. 肘部碰到有菌区应更换无菌手术衣 D. 取出的无菌物品未用，应放回无菌包内 E. 器械台无菌巾浸湿，应立即重新加盖 参考答案:D 答案解析:无菌物品一旦取出，无论使用与否，都应经消毒后再使用。
