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某硬木地板工程中，已知地板工程量为150m2，使用15mm×100mm×3000mm的木板条，损耗率为5%，则需要多少根木板条
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46) The teaching of English as a second language (ESL) in schools has had a history of conflicting arguments, interesting innovations and some very positive methodological changes. To understand the present situation, it is necessary to consider the past and the wider educational context which has a bearing on it.Until quite recently, approaches to ESL work have been strongly influenced by methods developed to teach English as a foreign language to older learners. These methods placed much emphasis on drills, exercises and remedial programs that focus on language in abstraction. 47) The prescriptive nature of such methods and the demands they made on the teacher’s time developed the belief that ESL work would be tackled only by the specialist ESL teacher working with small groups of children. 48) Such an approach does not fit comfortably into current notions of learning and teaching in the primary school, nor does it sufficientlv equip ESL learners in the secondary school to benefit from normal schooling. In prescribing what language is to be taught, it has ignored what children bring to the learning task and the choices they make about how and what they want to learn. Furthermore, the location and organization of language provision did not measure up to the demand. 49) The language centers and English language services all contributed to providing special and concentrated teaching of English as a second language in small groups, varying in size from four or five to fifteen, Whatever the pattern of provision, the main aim was to give pupils sufficient English to enable them to join normal schools as quickly as possible. The success of such special provision depended very much on the close and constant liaison of language teachers with the subject teachers and the class teachers and on the continuity of learning experiences provided by them. One of the important disadvantages of language centers and withdrawal groups was that ESL children were being taught away from those English-speakers who provide the most powerful models, i.e. their peer (地位相同的) group.Peer group interaction is an important element in any learning situation, but its particular strengths in a classroom with ESL learners cannot be over-emphasized.50) The separation of second-language learners from the main-stream classroom cannot easily be justified on educational grounds, since in practice it leads to both their curriculum and language learning being impoverished. The teaching of English as a second language (ESL) in schools has had a history of conflicting arguments, interesting innovations and some very positive methodological changes.
患者，女性，45岁。发热、咳脓痰1周，胸片右下背段浸润阴影。用青霉素治疗体温稍下降，但痰量增多，为脓血痰，有臭味。胸片大片浸润阴影中出现空腔。 治疗中需加用
(每题的备选项中，只有1个最符合题意) 某房地产开发公司拟在B市A区开发一个住宅小区，预计于2007年9月 1日开工，建筑工程项目的工期为28个月，工程合同价格为8000万元。该开发公司应当向工程所在地的区政府建设局申请领取施工许可证。工程的开工报告于2007年8月10日被批准。 该开发公司申请领取施工许可证的时间应当在( )。
患者，男，1岁2个月，仍未见第一颗乳牙萌出，已排除“无牙畸形”。 最可能的诊断是
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