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问题 选择题

设命题p：f（x）=2x2+mx+l在（0，+∞）内单调递增，命题q：m≥-1，则p是q的（　　）

A．充分不必要条件

B．必要不充分条件

C．充分必要条件

D．既不充分也不必要条件

答案

命题p：f（x）=2x2+mx+l在（0，+∞）内单调递增，所以-

m
4
≤0，所以m≥0，

因为命题q：m≥-1，所以m≥0则m≥-1成立，反之不成立，

所以p是q的充分不必要条件．

故选A．

多项选择题

对维生素C注射液的表述正确的是（）.

A.可采用亚硫酸氢钠作抗氧剂

B.处方中加入碳酸氢钠调节pH使成偏酸性，增加稳定性

C.可采用依地酸二钠络合金属离子，增加维生素C稳定性

D.配制时使用的注射用水需用二氧化碳饱和

E.采用100℃流通蒸汽15min灭菌
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问答题

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 hearing on it.

Until quite recently, approaches to ESL work have been ply 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. 46) The prescriptive nature of such methods and the demands they made on the teacher’s time developed the belief that ESL work could be tackled only by the specialist ESL teacher working with small groups of children. Such an approach does not fit comfortably into current notions of learning and teaching in the primary school, nor does it sufficiently equip ESL learners in the secondary school to benefit from normal schooling. 47) 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. 48)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. 49)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 group. Peer-group interaction is an important element in any learning situation, but its particular strengths in a classroom with ESL learners cannot be overemphasized.

50) The separation of second language learners from the mainstream classroom cannot easily be justified on educational grounds, since in practice it leads to both their curriculum and language learning being impoverished.

Notes: context 环境。bear on 对......有影响，关系到...... 。例如：I don’t see how this bears on the matter. (我不明白这一点与那些事的关系。)liaison n. 联结。liaison of A with A与B之间的联系。

47) 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.
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